feat: Initial commit - Train tracking system

Complete real-time train tracking system for Spanish railways (Renfe/Cercanías): - Backend API (Node.js/Express) with GTFS-RT polling workers - Frontend dashboard (React/Vite) with Leaflet maps - Real-time updates via Socket.io WebSocket - PostgreSQL/PostGIS database with Flyway migrations - Redis caching layer - Docker Compose configuration for development and production - Gitea CI/CD workflows (lint, auto-tag, release) - Production deployment with nginx + Let's Encrypt SSL 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
2025-11-28 00:21:15 +01:00
commit 34c0cb50c7
64 changed files with 15577 additions and 0 deletions
--- a/backend/.env.example
+++ b/backend/.env.example
@@ -0,0 +1,20 @@
+# API Configuration
+PORT=3000
+NODE_ENV=development
+LOG_LEVEL=info
+
+# Database
+DATABASE_URL=postgresql://trenes_user:trenes_password@localhost:5432/trenes_db
+
+# Redis
+REDIS_URL=redis://:redis_password@localhost:6379
+
+# GTFS-RT
+GTFS_RT_URL=https://gtfsrt.renfe.com/vehicle_positions.pb
+POLLING_INTERVAL=30000
+
+# CORS
+CORS_ORIGIN=http://localhost:3000,http://localhost:5173
+
+# JWT
+JWT_SECRET=your_jwt_secret_here
--- a/backend/Dockerfile
+++ b/backend/Dockerfile
@@ -0,0 +1,86 @@
+# Multi-stage Dockerfile para Backend (API + Worker)
+FROM node:20-alpine AS base
+
+# Instalar dependencias del sistema
+RUN apk add --no-cache \
+    python3 \
+    make \
+    g++ \
+    curl \
+    wget
+
+WORKDIR /app
+
+# Copiar archivos de dependencias
+COPY package*.json ./
+
+# Instalar dependencias
+RUN npm install --omit=dev && \
+    npm cache clean --force
+
+# Copiar código fuente
+COPY . .
+
+# ================================
+# Stage para API
+# ================================
+FROM base AS api
+
+ENV NODE_ENV=production
+ENV PORT=3000
+
+# Crear usuario no-root
+RUN addgroup -g 1001 -S nodejs && \
+    adduser -S nodejs -u 1001
+
+USER nodejs
+
+EXPOSE 3000
+
+# Health check
+HEALTHCHECK --interval=30s --timeout=10s --start-period=40s --retries=3 \
+    CMD wget --quiet --tries=1 --spider http://localhost:3000/health || exit 1
+
+CMD ["node", "src/api/server.js"]
+
+# ================================
+# Stage para Worker
+# ================================
+FROM base AS worker
+
+ENV NODE_ENV=production
+
+# Crear usuario no-root
+RUN addgroup -g 1001 -S nodejs && \
+    adduser -S nodejs -u 1001
+
+USER nodejs
+
+# Health check para worker (verifica que el proceso esté corriendo)
+HEALTHCHECK --interval=60s --timeout=10s --start-period=40s --retries=3 \
+    CMD pgrep -f "node.*worker" || exit 1
+
+CMD ["node", "src/worker/gtfs-poller.js"]
+
+# ================================
+# Stage de desarrollo (opcional)
+# ================================
+FROM node:20-alpine AS development
+
+RUN apk add --no-cache \
+    python3 \
+    make \
+    g++ \
+    curl \
+    wget
+
+WORKDIR /app
+
+COPY package*.json ./
+RUN npm install
+
+COPY . .
+
+ENV NODE_ENV=development
+
+CMD ["npm", "run", "dev"]
--- a/backend/package.json
+++ b/backend/package.json
@@ -0,0 +1,64 @@
+{
+  "name": "trenes-backend",
+  "version": "1.0.0",
+  "description": "Backend API y Worker para sistema de tracking de trenes en tiempo real",
+  "main": "src/api/server.js",
+  "type": "module",
+  "scripts": {
+    "dev": "nodemon src/api/server.js",
+    "dev:worker": "nodemon src/worker/gtfs-poller.js",
+    "dev:gtfs-static": "nodemon src/worker/gtfs-static-syncer.js",
+    "dev:trip-updates": "nodemon src/worker/trip-updates-poller.js",
+    "dev:alerts": "nodemon src/worker/alerts-poller.js",
+    "dev:analytics": "nodemon src/worker/analytics-refresher.js",
+    "start": "node src/api/server.js",
+    "start:worker": "node src/worker/gtfs-poller.js",
+    "start:gtfs-static": "node src/worker/gtfs-static-syncer.js",
+    "start:trip-updates": "node src/worker/trip-updates-poller.js",
+    "start:alerts": "node src/worker/alerts-poller.js",
+    "start:analytics": "node src/worker/analytics-refresher.js",
+    "test": "NODE_ENV=test jest",
+    "lint": "eslint src/**/*.js",
+    "format": "prettier --write src/**/*.js"
+  },
+  "keywords": [
+    "renfe",
+    "gtfs",
+    "gtfs-rt",
+    "trains",
+    "real-time"
+  ],
+  "author": "",
+  "license": "MIT",
+  "dependencies": {
+    "express": "^4.18.2",
+    "fastify": "^4.25.2",
+    "@fastify/cors": "^8.5.0",
+    "@fastify/websocket": "^8.3.1",
+    "socket.io": "^4.6.1",
+    "pg": "^8.11.3",
+    "redis": "^4.6.12",
+    "gtfs-realtime-bindings": "^1.1.0",
+    "node-fetch": "^3.3.2",
+    "dotenv": "^16.3.1",
+    "pino": "^8.17.2",
+    "pino-pretty": "^10.3.1",
+    "csv-parse": "^5.5.3",
+    "adm-zip": "^0.5.10",
+    "node-cron": "^3.0.3",
+    "express-rate-limit": "^7.1.5",
+    "helmet": "^7.1.0",
+    "express-validator": "^7.0.1",
+    "hpp": "^0.2.3",
+    "unzipper": "^0.12.3"
+  },
+  "devDependencies": {
+    "nodemon": "^3.0.2",
+    "eslint": "^8.56.0",
+    "prettier": "^3.1.1",
+    "jest": "^29.7.0"
+  },
+  "engines": {
+    "node": ">=20.0.0"
+  }
+}
--- a/backend/src/api/routes/alerts.js
+++ b/backend/src/api/routes/alerts.js
@@ -0,0 +1,112 @@
+import express from 'express';
+import db from '../../lib/db.js';
+import redis from '../../lib/redis.js';
+
+const router = express.Router();
+
+// GET /alerts - Get all active alerts
+router.get('/', async (req, res, next) => {
+  try {
+    const { route_id, severity, type } = req.query;
+
+    let query = `
+      SELECT *
+      FROM alerts
+      WHERE (end_time IS NULL OR end_time > NOW())
+        AND (start_time IS NULL OR start_time <= NOW())
+    `;
+
+    const params = [];
+    let paramIndex = 1;
+
+    if (route_id) {
+      query += ` AND route_id = $${paramIndex}`;
+      params.push(route_id);
+      paramIndex++;
+    }
+
+    if (severity) {
+      query += ` AND severity = $${paramIndex}`;
+      params.push(severity);
+      paramIndex++;
+    }
+
+    if (type) {
+      query += ` AND alert_type = $${paramIndex}`;
+      params.push(type);
+      paramIndex++;
+    }
+
+    query += ' ORDER BY severity DESC, created_at DESC';
+
+    const result = await db.query(query, params);
+
+    res.json(result.rows);
+  } catch (error) {
+    next(error);
+  }
+});
+
+// GET /alerts/:id - Get specific alert
+router.get('/:id', async (req, res, next) => {
+  try {
+    const { id } = req.params;
+
+    const result = await db.query(
+      'SELECT * FROM alerts WHERE alert_id = $1',
+      [id]
+    );
+
+    if (result.rows.length === 0) {
+      return res.status(404).json({
+        error: 'Alert not found',
+      });
+    }
+
+    res.json(result.rows[0]);
+  } catch (error) {
+    next(error);
+  }
+});
+
+// GET /alerts/route/:routeId - Get alerts for specific route
+router.get('/route/:routeId', async (req, res, next) => {
+  try {
+    const { routeId } = req.params;
+
+    const result = await db.query(`
+      SELECT *
+      FROM alerts
+      WHERE route_id = $1
+        AND (end_time IS NULL OR end_time > NOW())
+        AND (start_time IS NULL OR start_time <= NOW())
+      ORDER BY severity DESC, created_at DESC
+    `, [routeId]);
+
+    res.json(result.rows);
+  } catch (error) {
+    next(error);
+  }
+});
+
+// GET /alerts/train/:trainId - Get alerts for specific train
+router.get('/train/:trainId', async (req, res, next) => {
+  try {
+    const { trainId } = req.params;
+
+    const result = await db.query(`
+      SELECT *
+      FROM alerts
+      WHERE train_id = $1
+        AND (end_time IS NULL OR end_time > NOW())
+        AND (start_time IS NULL OR start_time <= NOW())
+      ORDER BY severity DESC, created_at DESC
+    `, [trainId]);
+
+    res.json(result.rows);
+  } catch (error) {
+    next(error);
+  }
+});
+
+export default router;
--- a/backend/src/api/routes/analytics.js
+++ b/backend/src/api/routes/analytics.js
@@ -0,0 +1,360 @@
+import express from 'express';
+import db from '../../lib/db.js';
+import redis from '../../lib/redis.js';
+
+const router = express.Router();
+
+// GET /analytics/traffic/heatmap - Get traffic heatmap data
+router.get('/traffic/heatmap', async (req, res, next) => {
+  try {
+    const {
+      start_date = new Date(Date.now() - 7 * 24 * 60 * 60 * 1000).toISOString(),
+      end_date = new Date().toISOString(),
+      grid_size = 0.1,
+    } = req.query;
+
+    // Check cache
+    const cacheKey = `analytics:heatmap:${start_date}:${end_date}:${grid_size}`;
+    const cached = await redis.get(cacheKey);
+    if (cached) {
+      return res.json(JSON.parse(cached));
+    }
+
+    const result = await db.query(
+      'SELECT * FROM get_traffic_heatmap($1, $2, $3)',
+      [start_date, end_date, parseFloat(grid_size)]
+    );
+
+    const heatmapData = result.rows.map(row => ({
+      lat: row.lat_bucket,
+      lon: row.lon_bucket,
+      intensity: parseInt(row.train_count, 10),
+      avgSpeed: parseFloat(row.avg_speed || 0),
+    }));
+
+    // Cache for 15 minutes
+    await redis.set(cacheKey, JSON.stringify(heatmapData), 900);
+
+    res.json(heatmapData);
+  } catch (error) {
+    next(error);
+  }
+});
+
+// GET /analytics/traffic/hourly - Get hourly traffic pattern
+router.get('/traffic/hourly', async (req, res, next) => {
+  try {
+    const { days = 7 } = req.query;
+
+    const cacheKey = `analytics:hourly:${days}`;
+    const cached = await redis.get(cacheKey);
+    if (cached) {
+      return res.json(JSON.parse(cached));
+    }
+
+    const result = await db.query(
+      'SELECT * FROM get_hourly_traffic_pattern($1)',
+      [parseInt(days, 10)]
+    );
+
+    // Cache for 1 hour
+    await redis.set(cacheKey, JSON.stringify(result.rows), 3600);
+
+    res.json(result.rows);
+  } catch (error) {
+    next(error);
+  }
+});
+
+// GET /analytics/traffic/by-hour - Get materialized view data
+router.get('/traffic/by-hour', async (req, res, next) => {
+  try {
+    const { limit = 24 } = req.query;
+
+    const result = await db.query(
+      'SELECT * FROM traffic_by_hour ORDER BY hour DESC LIMIT $1',
+      [parseInt(limit, 10)]
+    );
+
+    res.json(result.rows);
+  } catch (error) {
+    next(error);
+  }
+});
+
+// GET /analytics/traffic/by-route - Get traffic by route
+router.get('/traffic/by-route', async (req, res, next) => {
+  try {
+    const result = await db.query(
+      'SELECT * FROM traffic_by_route ORDER BY total_trains DESC'
+    );
+
+    res.json(result.rows);
+  } catch (error) {
+    next(error);
+  }
+});
+
+// GET /analytics/statistics/daily - Get daily statistics
+router.get('/statistics/daily', async (req, res, next) => {
+  try {
+    const { days = 30 } = req.query;
+
+    const result = await db.query(
+      'SELECT * FROM daily_statistics ORDER BY date DESC LIMIT $1',
+      [parseInt(days, 10)]
+    );
+
+    res.json(result.rows);
+  } catch (error) {
+    next(error);
+  }
+});
+
+// GET /analytics/statistics/system - Get current system status
+router.get('/statistics/system', async (req, res, next) => {
+  try {
+    const result = await db.query('SELECT * FROM system_status');
+
+    res.json(result.rows[0] || {});
+  } catch (error) {
+    next(error);
+  }
+});
+
+// GET /analytics/performance/routes - Get route performance metrics
+router.get('/performance/routes', async (req, res, next) => {
+  try {
+    const { limit = 20 } = req.query;
+
+    const result = await db.query(
+      'SELECT * FROM route_performance ORDER BY punctuality_percentage DESC LIMIT $1',
+      [parseInt(limit, 10)]
+    );
+
+    res.json(result.rows);
+  } catch (error) {
+    next(error);
+  }
+});
+
+// GET /analytics/performance/route/:routeId - Get specific route statistics
+router.get('/performance/route/:routeId', async (req, res, next) => {
+  try {
+    const { routeId } = req.params;
+    const { days = 7 } = req.query;
+
+    const result = await db.query(
+      'SELECT * FROM get_route_statistics($1, $2)',
+      [routeId, parseInt(days, 10)]
+    );
+
+    if (result.rows.length === 0) {
+      return res.status(404).json({
+        error: 'Route not found or no data available',
+      });
+    }
+
+    res.json(result.rows[0]);
+  } catch (error) {
+    next(error);
+  }
+});
+
+// GET /analytics/delays/top-routes - Get most delayed routes
+router.get('/delays/top-routes', async (req, res, next) => {
+  try {
+    const result = await db.query('SELECT * FROM top_delayed_routes');
+
+    res.json(result.rows);
+  } catch (error) {
+    next(error);
+  }
+});
+
+// GET /analytics/stations/busiest - Get busiest stations
+router.get('/stations/busiest', async (req, res, next) => {
+  try {
+    const { limit = 20 } = req.query;
+
+    const result = await db.query(
+      'SELECT * FROM busiest_stations LIMIT $1',
+      [parseInt(limit, 10)]
+    );
+
+    res.json(result.rows);
+  } catch (error) {
+    next(error);
+  }
+});
+
+// GET /analytics/stations/:stationId/statistics - Get station statistics
+router.get('/stations/:stationId/statistics', async (req, res, next) => {
+  try {
+    const { stationId } = req.params;
+    const { days = 7 } = req.query;
+
+    const result = await db.query(
+      'SELECT * FROM get_station_statistics($1, $2)',
+      [stationId, parseInt(days, 10)]
+    );
+
+    if (result.rows.length === 0) {
+      return res.status(404).json({
+        error: 'Station not found or no data available',
+      });
+    }
+
+    res.json(result.rows[0]);
+  } catch (error) {
+    next(error);
+  }
+});
+
+// GET /analytics/trains/:trainId/distance - Calculate distance traveled
+router.get('/trains/:trainId/distance', async (req, res, next) => {
+  try {
+    const { trainId } = req.params;
+    const {
+      start_time = new Date(Date.now() - 24 * 60 * 60 * 1000).toISOString(),
+      end_time = new Date().toISOString(),
+    } = req.query;
+
+    const result = await db.query(
+      'SELECT calculate_distance_traveled($1, $2, $3) as distance_km',
+      [trainId, start_time, end_time]
+    );
+
+    res.json({
+      train_id: trainId,
+      start_time,
+      end_time,
+      distance_km: parseFloat(result.rows[0].distance_km || 0),
+    });
+  } catch (error) {
+    next(error);
+  }
+});
+
+// POST /analytics/refresh - Refresh materialized views (admin endpoint)
+router.post('/refresh', async (req, res, next) => {
+  try {
+    await db.query('SELECT refresh_all_analytics_views()');
+
+    res.json({
+      success: true,
+      message: 'Analytics views refreshed successfully',
+      timestamp: new Date().toISOString(),
+    });
+  } catch (error) {
+    next(error);
+  }
+});
+
+// GET /analytics/export - Export data (basic implementation)
+router.get('/export', async (req, res, next) => {
+  try {
+    const {
+      table,
+      format = 'json',
+      start_date,
+      end_date,
+      limit = 1000,
+    } = req.query;
+
+    // Whitelist allowed tables
+    const allowedTables = [
+      'train_positions',
+      'trains',
+      'routes',
+      'stations',
+      'alerts',
+      'trip_updates',
+      'traffic_by_hour',
+      'daily_statistics',
+    ];
+
+    if (!table || !allowedTables.includes(table)) {
+      return res.status(400).json({
+        error: 'Invalid or missing table parameter',
+        allowed_tables: allowedTables,
+      });
+    }
+
+    // Build query with filters
+    let query = `SELECT * FROM ${table}`;
+    const params = [];
+    const conditions = [];
+
+    if (start_date && (table === 'train_positions' || table === 'trip_updates' || table === 'alerts')) {
+      params.push(start_date);
+      conditions.push(`recorded_at >= $${params.length}`);
+    }
+
+    if (end_date && (table === 'train_positions' || table === 'trip_updates' || table === 'alerts')) {
+      params.push(end_date);
+      conditions.push(`recorded_at <= $${params.length}`);
+    }
+
+    if (conditions.length > 0) {
+      query += ' WHERE ' + conditions.join(' AND ');
+    }
+
+    query += ` ORDER BY ${table === 'train_positions' || table === 'trip_updates' ? 'recorded_at' : table === 'routes' ? 'route_id' : 'created_at'} DESC LIMIT $${params.length + 1}`;
+    params.push(parseInt(limit, 10));
+
+    const result = await db.query(query, params);
+
+    if (format === 'csv') {
+      // Simple CSV export
+      if (result.rows.length === 0) {
+        return res.status(404).json({ error: 'No data found' });
+      }
+
+      const headers = Object.keys(result.rows[0]);
+      const csvRows = [
+        headers.join(','),
+        ...result.rows.map(row =>
+          headers.map(header => {
+            const value = row[header];
+            return typeof value === 'string' && value.includes(',')
+              ? `"${value}"`
+              : value;
+          }).join(',')
+        ),
+      ];
+
+      res.setHeader('Content-Type', 'text/csv');
+      res.setHeader('Content-Disposition', `attachment; filename="${table}_${Date.now()}.csv"`);
+      res.send(csvRows.join('\n'));
+    } else if (format === 'geojson' && (table === 'train_positions' || table === 'stations')) {
+      // GeoJSON export for spatial data
+      const features = result.rows
+        .filter(row => row.latitude && row.longitude)
+        .map(row => ({
+          type: 'Feature',
+          geometry: {
+            type: 'Point',
+            coordinates: [parseFloat(row.longitude), parseFloat(row.latitude)],
+          },
+          properties: { ...row, latitude: undefined, longitude: undefined },
+        }));
+
+      const geojson = {
+        type: 'FeatureCollection',
+        features,
+      };
+
+      res.setHeader('Content-Type', 'application/geo+json');
+      res.setHeader('Content-Disposition', `attachment; filename="${table}_${Date.now()}.geojson"`);
+      res.json(geojson);
+    } else {
+      // JSON export (default)
+      res.json(result.rows);
+    }
+  } catch (error) {
+    next(error);
+  }
+});
+
+export default router;
--- a/backend/src/api/routes/dashboard.js
+++ b/backend/src/api/routes/dashboard.js
@@ -0,0 +1,347 @@
+import express from 'express';
+import db from '../../lib/db.js';
+import redis from '../../lib/redis.js';
+
+const router = express.Router();
+
+// Map nucleo codes to region names
+const NUCLEO_NAMES = {
+  '10': 'Madrid',
+  '20': 'Barcelona',
+  '30': 'Sevilla',
+  '31': 'Cadiz',
+  '40': 'Valencia',
+  '41': 'Murcia/Alicante',
+  '50': 'Bilbao',
+  '60': 'Asturias',
+  '61': 'Santander',
+  '62': 'San Sebastian',
+  '70': 'Malaga',
+};
+
+// GET /dashboard/snapshot - Get stats for a specific point in time
+router.get('/snapshot', async (req, res, next) => {
+  try {
+    const { timestamp } = req.query;
+    const targetTime = timestamp ? new Date(timestamp) : new Date();
+
+    // Get a 1-minute window around the target time
+    const startTime = new Date(targetTime.getTime() - 30000);
+    const endTime = new Date(targetTime.getTime() + 30000);
+
+    // Get train positions at that time
+    const positionsResult = await db.query(`
+      SELECT DISTINCT ON (train_id)
+        train_id,
+        status,
+        speed,
+        latitude,
+        longitude,
+        bearing,
+        recorded_at
+      FROM train_positions
+      WHERE recorded_at BETWEEN $1 AND $2
+      ORDER BY train_id, recorded_at DESC
+    `, [startTime, endTime]);
+
+    // Get punctuality data at that time
+    const punctualityResult = await db.query(`
+      SELECT DISTINCT ON (train_id)
+        train_id,
+        line_code,
+        nucleo,
+        delay_minutes,
+        origin_station_code,
+        destination_station_code,
+        recorded_at
+      FROM train_punctuality
+      WHERE recorded_at BETWEEN $1 AND $2
+      ORDER BY train_id, recorded_at DESC
+    `, [startTime, endTime]);
+
+    // Calculate statistics
+    const trains = positionsResult.rows;
+    const punctuality = punctualityResult.rows;
+
+    // Train status breakdown
+    const statusCounts = {
+      IN_TRANSIT_TO: 0,
+      STOPPED_AT: 0,
+      INCOMING_AT: 0,
+      UNKNOWN: 0,
+    };
+    for (const train of trains) {
+      statusCounts[train.status] = (statusCounts[train.status] || 0) + 1;
+    }
+
+    // Punctuality breakdown
+    const punctualityCounts = {
+      on_time: 0,        // delay = 0
+      minor_delay: 0,    // 1-5 min
+      moderate_delay: 0, // 6-15 min
+      severe_delay: 0,   // >15 min
+      early: 0,          // < 0
+    };
+    let totalDelay = 0;
+    for (const p of punctuality) {
+      const delay = p.delay_minutes;
+      totalDelay += delay;
+      if (delay < 0) punctualityCounts.early++;
+      else if (delay === 0) punctualityCounts.on_time++;
+      else if (delay <= 5) punctualityCounts.minor_delay++;
+      else if (delay <= 15) punctualityCounts.moderate_delay++;
+      else punctualityCounts.severe_delay++;
+    }
+
+    // Lines breakdown
+    const linesCounts = {};
+    for (const p of punctuality) {
+      if (p.line_code) {
+        linesCounts[p.line_code] = (linesCounts[p.line_code] || 0) + 1;
+      }
+    }
+
+    // Nucleos breakdown
+    const nucleosCounts = {};
+    for (const p of punctuality) {
+      if (p.nucleo) {
+        nucleosCounts[p.nucleo] = (nucleosCounts[p.nucleo] || 0) + 1;
+      }
+    }
+
+    res.json({
+      timestamp: targetTime.toISOString(),
+      total_trains: trains.length,
+      status_breakdown: statusCounts,
+      punctuality_breakdown: punctualityCounts,
+      average_delay: punctuality.length > 0 ? (totalDelay / punctuality.length).toFixed(2) : 0,
+      lines_breakdown: linesCounts,
+      nucleos_breakdown: nucleosCounts,
+      punctuality_percentage: punctuality.length > 0
+        ? ((punctualityCounts.on_time + punctualityCounts.minor_delay) / punctuality.length * 100).toFixed(1)
+        : 0,
+    });
+  } catch (error) {
+    next(error);
+  }
+});
+
+// GET /dashboard/current - Get current live stats
+router.get('/current', async (req, res, next) => {
+  try {
+    // Get active trains from Redis
+    const trainIds = await redis.sMembers('trains:active');
+
+    // Get all current positions
+    const trains = await Promise.all(
+      trainIds.map(async (trainId) => {
+        const data = await redis.get(`trains:current:${trainId}`);
+        const fleetData = await redis.get(`fleet:${trainId}`);
+        return {
+          position: data ? JSON.parse(data) : null,
+          fleet: fleetData ? JSON.parse(fleetData) : null,
+        };
+      })
+    );
+
+    const validTrains = trains.filter(t => t.position !== null);
+
+    // Calculate status breakdown
+    const statusCounts = {
+      IN_TRANSIT_TO: 0,
+      STOPPED_AT: 0,
+      INCOMING_AT: 0,
+      UNKNOWN: 0,
+    };
+    for (const t of validTrains) {
+      const status = t.position.status || 'UNKNOWN';
+      statusCounts[status] = (statusCounts[status] || 0) + 1;
+    }
+
+    // Calculate punctuality from fleet data
+    const punctualityCounts = {
+      on_time: 0,
+      minor_delay: 0,
+      moderate_delay: 0,
+      severe_delay: 0,
+      early: 0,
+    };
+    let totalDelay = 0;
+    let delayCount = 0;
+
+    // Lines breakdown by nucleo (key: "nucleo:line")
+    const linesWithNucleo = {};
+    const nucleosCounts = {};
+
+    for (const t of validTrains) {
+      if (t.fleet) {
+        const delay = parseInt(t.fleet.retrasoMin, 10) || 0;
+        totalDelay += delay;
+        delayCount++;
+
+        if (delay < 0) punctualityCounts.early++;
+        else if (delay === 0) punctualityCounts.on_time++;
+        else if (delay <= 5) punctualityCounts.minor_delay++;
+        else if (delay <= 15) punctualityCounts.moderate_delay++;
+        else punctualityCounts.severe_delay++;
+
+        if (t.fleet.codLinea && t.fleet.nucleo) {
+          const key = `${t.fleet.nucleo}:${t.fleet.codLinea}`;
+          if (!linesWithNucleo[key]) {
+            linesWithNucleo[key] = {
+              line_code: t.fleet.codLinea,
+              nucleo: t.fleet.nucleo,
+              nucleo_name: NUCLEO_NAMES[t.fleet.nucleo] || t.fleet.nucleo,
+              count: 0,
+            };
+          }
+          linesWithNucleo[key].count++;
+        }
+        if (t.fleet.nucleo) {
+          if (!nucleosCounts[t.fleet.nucleo]) {
+            nucleosCounts[t.fleet.nucleo] = {
+              nucleo: t.fleet.nucleo,
+              nucleo_name: NUCLEO_NAMES[t.fleet.nucleo] || t.fleet.nucleo,
+              count: 0,
+            };
+          }
+          nucleosCounts[t.fleet.nucleo].count++;
+        }
+      }
+    }
+
+    // Convert to arrays sorted by count
+    const linesArray = Object.values(linesWithNucleo).sort((a, b) => b.count - a.count);
+    const nucleosArray = Object.values(nucleosCounts).sort((a, b) => b.count - a.count);
+
+    res.json({
+      timestamp: new Date().toISOString(),
+      total_trains: validTrains.length,
+      status_breakdown: statusCounts,
+      punctuality_breakdown: punctualityCounts,
+      average_delay: delayCount > 0 ? (totalDelay / delayCount).toFixed(2) : 0,
+      lines_breakdown: linesArray,
+      nucleos_breakdown: nucleosArray,
+      punctuality_percentage: delayCount > 0
+        ? ((punctualityCounts.on_time + punctualityCounts.minor_delay) / delayCount * 100).toFixed(1)
+        : 0,
+    });
+  } catch (error) {
+    next(error);
+  }
+});
+
+// GET /dashboard/timeline - Get stats over a time range
+router.get('/timeline', async (req, res, next) => {
+  try {
+    const { start, end, interval = '5' } = req.query;
+
+    const startTime = start ? new Date(start) : new Date(Date.now() - 3600000); // Last hour
+    const endTime = end ? new Date(end) : new Date();
+    const intervalMinutes = parseInt(interval, 10);
+
+    const result = await db.query(`
+      WITH time_buckets AS (
+        SELECT
+          date_trunc('minute', recorded_at) -
+          (EXTRACT(MINUTE FROM recorded_at)::INTEGER % $3) * INTERVAL '1 minute' as time_bucket,
+          train_id,
+          delay_minutes,
+          line_code
+        FROM train_punctuality
+        WHERE recorded_at BETWEEN $1 AND $2
+      )
+      SELECT
+        time_bucket,
+        COUNT(DISTINCT train_id) as train_count,
+        AVG(delay_minutes)::FLOAT as avg_delay,
+        COUNT(CASE WHEN delay_minutes <= 5 THEN 1 END)::FLOAT /
+          NULLIF(COUNT(*), 0) * 100 as punctuality_pct,
+        COUNT(CASE WHEN delay_minutes = 0 THEN 1 END) as on_time,
+        COUNT(CASE WHEN delay_minutes > 0 AND delay_minutes <= 5 THEN 1 END) as minor_delay,
+        COUNT(CASE WHEN delay_minutes > 5 AND delay_minutes <= 15 THEN 1 END) as moderate_delay,
+        COUNT(CASE WHEN delay_minutes > 15 THEN 1 END) as severe_delay
+      FROM time_buckets
+      GROUP BY time_bucket
+      ORDER BY time_bucket
+    `, [startTime, endTime, intervalMinutes]);
+
+    res.json({
+      start: startTime.toISOString(),
+      end: endTime.toISOString(),
+      interval_minutes: intervalMinutes,
+      data: result.rows.map(row => ({
+        timestamp: row.time_bucket,
+        train_count: parseInt(row.train_count, 10),
+        avg_delay: parseFloat(row.avg_delay) || 0,
+        punctuality_pct: parseFloat(row.punctuality_pct) || 0,
+        on_time: parseInt(row.on_time, 10),
+        minor_delay: parseInt(row.minor_delay, 10),
+        moderate_delay: parseInt(row.moderate_delay, 10),
+        severe_delay: parseInt(row.severe_delay, 10),
+      })),
+    });
+  } catch (error) {
+    next(error);
+  }
+});
+
+// GET /dashboard/lines-ranking - Get lines ranked by punctuality
+router.get('/lines-ranking', async (req, res, next) => {
+  try {
+    const { timestamp, hours = 24 } = req.query;
+    const targetTime = timestamp ? new Date(timestamp) : new Date();
+    const startTime = new Date(targetTime.getTime() - hours * 3600000);
+
+    const result = await db.query(`
+      SELECT
+        line_code,
+        nucleo,
+        COUNT(*) as observations,
+        COUNT(DISTINCT train_id) as unique_trains,
+        AVG(delay_minutes)::FLOAT as avg_delay,
+        MAX(delay_minutes) as max_delay,
+        ROUND(
+          COUNT(CASE WHEN delay_minutes <= 5 THEN 1 END)::NUMERIC /
+          NULLIF(COUNT(*), 0) * 100, 1
+        ) as punctuality_pct
+      FROM train_punctuality
+      WHERE recorded_at BETWEEN $1 AND $2
+        AND line_code IS NOT NULL
+      GROUP BY line_code, nucleo
+      HAVING COUNT(*) >= 10
+      ORDER BY punctuality_pct ASC
+    `, [startTime, targetTime]);
+
+    // Add nucleo_name to each row
+    const rowsWithNucleoName = result.rows.map(row => ({
+      ...row,
+      nucleo_name: NUCLEO_NAMES[row.nucleo] || row.nucleo,
+    }));
+
+    res.json(rowsWithNucleoName);
+  } catch (error) {
+    next(error);
+  }
+});
+
+// GET /dashboard/available-range - Get available data time range
+router.get('/available-range', async (req, res, next) => {
+  try {
+    const result = await db.query(`
+      SELECT
+        MIN(recorded_at) as earliest,
+        MAX(recorded_at) as latest
+      FROM train_punctuality
+    `);
+
+    res.json({
+      earliest: result.rows[0]?.earliest,
+      latest: result.rows[0]?.latest,
+    });
+  } catch (error) {
+    next(error);
+  }
+});
+
+export default router;
--- a/backend/src/api/routes/explorer.js
+++ b/backend/src/api/routes/explorer.js
@@ -0,0 +1,371 @@
+import express from 'express';
+import db from '../../lib/db.js';
+import redis from '../../lib/redis.js';
+
+const router = express.Router();
+
+// GET /explorer/routes/:routeId - Get complete route information
+router.get('/routes/:routeId', async (req, res, next) => {
+  try {
+    const { routeId } = req.params;
+
+    // Get route info
+    const routeResult = await db.query(
+      'SELECT * FROM routes WHERE route_id = $1',
+      [routeId]
+    );
+
+    if (routeResult.rows.length === 0) {
+      return res.status(404).json({ error: 'Route not found' });
+    }
+
+    const route = routeResult.rows[0];
+
+    // Get all trips for this route
+    const tripsResult = await db.query(
+      'SELECT * FROM trips WHERE route_id = $1 ORDER BY trip_id',
+      [routeId]
+    );
+
+    // Get all stops for this route (from any trip)
+    const stopsResult = await db.query(`
+      SELECT DISTINCT ON (s.stop_id)
+        s.stop_id,
+        s.stop_name,
+        s.stop_lat,
+        s.stop_lon,
+        s.location_type,
+        s.parent_station
+      FROM stops s
+      JOIN stop_times st ON s.stop_id = st.stop_id
+      JOIN trips t ON st.trip_id = t.trip_id
+      WHERE t.route_id = $1
+      ORDER BY s.stop_id
+    `, [routeId]);
+
+    // Get shape if available
+    const shapeResult = await db.query(`
+      SELECT DISTINCT shape_id FROM trips WHERE route_id = $1 AND shape_id IS NOT NULL LIMIT 1
+    `, [routeId]);
+
+    let shape = null;
+    if (shapeResult.rows.length > 0 && shapeResult.rows[0].shape_id) {
+      const shapePointsResult = await db.query(`
+        SELECT
+          shape_pt_lat,
+          shape_pt_lon,
+          shape_pt_sequence,
+          shape_dist_traveled
+        FROM shapes
+        WHERE shape_id = $1
+        ORDER BY shape_pt_sequence
+      `, [shapeResult.rows[0].shape_id]);
+
+      shape = {
+        shape_id: shapeResult.rows[0].shape_id,
+        points: shapePointsResult.rows.map(p => ({
+          lat: parseFloat(p.shape_pt_lat),
+          lon: parseFloat(p.shape_pt_lon),
+          sequence: p.shape_pt_sequence,
+          distance: p.shape_dist_traveled,
+        })),
+      };
+    }
+
+    res.json({
+      route,
+      trips: tripsResult.rows,
+      stops: stopsResult.rows,
+      shape,
+      total_trips: tripsResult.rows.length,
+      total_stops: stopsResult.rows.length,
+    });
+  } catch (error) {
+    next(error);
+  }
+});
+
+// GET /explorer/trips/:tripId/schedule - Get complete trip schedule
+router.get('/trips/:tripId/schedule', async (req, res, next) => {
+  try {
+    const { tripId } = req.params;
+
+    const result = await db.query(
+      'SELECT * FROM get_trip_schedule($1)',
+      [tripId]
+    );
+
+    if (result.rows.length === 0) {
+      return res.status(404).json({ error: 'Trip not found' });
+    }
+
+    res.json(result.rows);
+  } catch (error) {
+    next(error);
+  }
+});
+
+// GET /explorer/stations/:stationId - Get complete station information
+router.get('/stations/:stationId', async (req, res, next) => {
+  try {
+    const { stationId } = req.params;
+
+    // Get station info
+    const stationResult = await db.query(
+      'SELECT * FROM stops WHERE stop_id = $1',
+      [stationId]
+    );
+
+    if (stationResult.rows.length === 0) {
+      return res.status(404).json({ error: 'Station not found' });
+    }
+
+    const station = stationResult.rows[0];
+
+    // Get next departures
+    const departuresResult = await db.query(
+      'SELECT * FROM get_next_departures($1, 10)',
+      [stationId]
+    );
+
+    // Get routes that serve this station
+    const routesResult = await db.query(`
+      SELECT DISTINCT r.*
+      FROM routes r
+      JOIN trips t ON r.route_id = t.route_id
+      JOIN stop_times st ON t.trip_id = st.trip_id
+      WHERE st.stop_id = $1
+    `, [stationId]);
+
+    // Get statistics
+    const statsResult = await db.query(
+      'SELECT * FROM get_station_statistics($1, 7)',
+      [stationId]
+    );
+
+    res.json({
+      station,
+      next_departures: departuresResult.rows,
+      routes: routesResult.rows,
+      statistics: statsResult.rows[0] || null,
+    });
+  } catch (error) {
+    next(error);
+  }
+});
+
+// GET /explorer/planner - Trip planner (basic implementation)
+router.get('/planner', async (req, res, next) => {
+  try {
+    const { origin, destination, time, date } = req.query;
+
+    if (!origin || !destination) {
+      return res.status(400).json({
+        error: 'Origin and destination are required',
+      });
+    }
+
+    // Get direct trips between two stations
+    const directTripsResult = await db.query(`
+      SELECT
+        t.trip_id,
+        t.route_id,
+        r.route_name,
+        t.trip_headsign,
+        origin_st.departure_time as origin_departure,
+        dest_st.arrival_time as destination_arrival,
+        EXTRACT(EPOCH FROM (dest_st.arrival_time - origin_st.departure_time)) / 60 as duration_minutes,
+        origin_st.stop_sequence as origin_sequence,
+        dest_st.stop_sequence as destination_sequence
+      FROM trips t
+      JOIN routes r ON t.route_id = r.route_id
+      JOIN stop_times origin_st ON t.trip_id = origin_st.trip_id AND origin_st.stop_id = $1
+      JOIN stop_times dest_st ON t.trip_id = dest_st.trip_id AND dest_st.stop_id = $2
+      WHERE origin_st.stop_sequence < dest_st.stop_sequence
+        AND ($3::TIME IS NULL OR origin_st.departure_time >= $3::TIME)
+      ORDER BY origin_st.departure_time
+      LIMIT 10
+    `, [origin, destination, time || null]);
+
+    // Get trip updates for delay info
+    const tripsWithDelays = await Promise.all(
+      directTripsResult.rows.map(async (trip) => {
+        const delayResult = await db.query(`
+          SELECT delay_seconds, schedule_relationship
+          FROM trip_updates
+          WHERE trip_id = $1
+            AND received_at > NOW() - INTERVAL '10 minutes'
+          ORDER BY received_at DESC
+          LIMIT 1
+        `, [trip.trip_id]);
+
+        return {
+          ...trip,
+          delay: delayResult.rows[0] || null,
+        };
+      })
+    );
+
+    // Find trips with one transfer
+    const oneTransferResult = await db.query(`
+      WITH possible_transfers AS (
+        SELECT
+          t1.trip_id as trip1_id,
+          t1.route_id as route1_id,
+          r1.route_name as route1_name,
+          t2.trip_id as trip2_id,
+          t2.route_id as route2_id,
+          r2.route_name as route2_name,
+          origin_st.departure_time as origin_departure,
+          transfer_st1.arrival_time as transfer_arrival,
+          transfer_st2.departure_time as transfer_departure,
+          dest_st.arrival_time as destination_arrival,
+          transfer_st1.stop_id as transfer_station,
+          s.stop_name as transfer_station_name
+        FROM trips t1
+        JOIN routes r1 ON t1.route_id = r1.route_id
+        JOIN stop_times origin_st ON t1.trip_id = origin_st.trip_id AND origin_st.stop_id = $1
+        JOIN stop_times transfer_st1 ON t1.trip_id = transfer_st1.trip_id
+        JOIN stops s ON transfer_st1.stop_id = s.stop_id
+        JOIN stop_times transfer_st2 ON transfer_st1.stop_id = transfer_st2.stop_id
+        JOIN trips t2 ON transfer_st2.trip_id = t2.trip_id
+        JOIN routes r2 ON t2.route_id = r2.route_id
+        JOIN stop_times dest_st ON t2.trip_id = dest_st.trip_id AND dest_st.stop_id = $2
+        WHERE origin_st.stop_sequence < transfer_st1.stop_sequence
+          AND transfer_st2.stop_sequence < dest_st.stop_sequence
+          AND transfer_st1.arrival_time < transfer_st2.departure_time
+          AND (transfer_st2.departure_time - transfer_st1.arrival_time) >= INTERVAL '5 minutes'
+          AND (transfer_st2.departure_time - transfer_st1.arrival_time) <= INTERVAL '60 minutes'
+          AND ($3::TIME IS NULL OR origin_st.departure_time >= $3::TIME)
+      )
+      SELECT
+        *,
+        EXTRACT(EPOCH FROM (destination_arrival - origin_departure)) / 60 as total_duration_minutes
+      FROM possible_transfers
+      ORDER BY origin_departure, total_duration_minutes
+      LIMIT 5
+    `, [origin, destination, time || null]);
+
+    res.json({
+      origin,
+      destination,
+      requested_time: time || 'any',
+      requested_date: date || 'today',
+      direct_trips: tripsWithDelays,
+      trips_with_transfer: oneTransferResult.rows,
+      total_options: directTripsResult.rows.length + oneTransferResult.rows.length,
+    });
+  } catch (error) {
+    next(error);
+  }
+});
+
+// GET /explorer/stations/:stationId/nearby - Get nearby stations
+router.get('/stations/:stationId/nearby', async (req, res, next) => {
+  try {
+    const { stationId } = req.params;
+    const { radius = 5 } = req.query; // radius in km
+
+    const result = await db.query(`
+      WITH target_station AS (
+        SELECT stop_lat, stop_lon
+        FROM stops
+        WHERE stop_id = $1
+      )
+      SELECT
+        s.stop_id,
+        s.stop_name,
+        s.stop_lat,
+        s.stop_lon,
+        ST_Distance(
+          ST_SetSRID(ST_MakePoint(s.stop_lon, s.stop_lat), 4326)::geography,
+          ST_SetSRID(ST_MakePoint(ts.stop_lon, ts.stop_lat), 4326)::geography
+        ) / 1000 as distance_km
+      FROM stops s, target_station ts
+      WHERE s.stop_id != $1
+        AND ST_DWithin(
+          ST_SetSRID(ST_MakePoint(s.stop_lon, s.stop_lat), 4326)::geography,
+          ST_SetSRID(ST_MakePoint(ts.stop_lon, ts.stop_lat), 4326)::geography,
+          $2 * 1000
+        )
+      ORDER BY distance_km
+      LIMIT 20
+    `, [stationId, parseFloat(radius)]);
+
+    res.json(result.rows);
+  } catch (error) {
+    next(error);
+  }
+});
+
+// GET /explorer/routes/between - Find all routes between two stations
+router.get('/routes/between', async (req, res, next) => {
+  try {
+    const { origin, destination } = req.query;
+
+    if (!origin || !destination) {
+      return res.status(400).json({
+        error: 'Origin and destination are required',
+      });
+    }
+
+    const result = await db.query(`
+      SELECT DISTINCT
+        r.route_id,
+        r.route_name,
+        r.route_type,
+        r.route_color,
+        COUNT(DISTINCT t.trip_id) as daily_trips
+      FROM routes r
+      JOIN trips t ON r.route_id = t.route_id
+      JOIN stop_times origin_st ON t.trip_id = origin_st.trip_id AND origin_st.stop_id = $1
+      JOIN stop_times dest_st ON t.trip_id = dest_st.trip_id AND dest_st.stop_id = $2
+      WHERE origin_st.stop_sequence < dest_st.stop_sequence
+      GROUP BY r.route_id, r.route_name, r.route_type, r.route_color
+      ORDER BY daily_trips DESC
+    `, [origin, destination]);
+
+    res.json(result.rows);
+  } catch (error) {
+    next(error);
+  }
+});
+
+// GET /explorer/search - Search for stations by name
+router.get('/search', async (req, res, next) => {
+  try {
+    const { query, limit = 10 } = req.query;
+
+    if (!query || query.length < 2) {
+      return res.status(400).json({
+        error: 'Search query must be at least 2 characters',
+      });
+    }
+
+    const result = await db.query(`
+      SELECT
+        stop_id,
+        stop_name,
+        stop_lat,
+        stop_lon,
+        location_type,
+        parent_station
+      FROM stops
+      WHERE stop_name ILIKE $1
+      ORDER BY
+        CASE
+          WHEN stop_name ILIKE $2 THEN 1
+          WHEN stop_name ILIKE $3 THEN 2
+          ELSE 3
+        END,
+        stop_name
+      LIMIT $4
+    `, [`%${query}%`, `${query}%`, `% ${query}%`, parseInt(limit, 10)]);
+
+    res.json(result.rows);
+  } catch (error) {
+    next(error);
+  }
+});
+
+export default router;
--- a/backend/src/api/routes/lines.js
+++ b/backend/src/api/routes/lines.js
@@ -0,0 +1,160 @@
+import express from 'express';
+import db from '../../lib/db.js';
+import logger from '../../lib/logger.js';
+
+const router = express.Router();
+
+// GET /lines - Get all train lines
+router.get('/', async (req, res, next) => {
+  try {
+    const { nucleo } = req.query;
+
+    let query = `
+      SELECT
+        line_id,
+        line_code,
+        line_name,
+        nucleo_id,
+        nucleo_name,
+        color,
+        metadata
+      FROM train_lines
+    `;
+
+    const params = [];
+    if (nucleo) {
+      query += ' WHERE nucleo_id = $1';
+      params.push(nucleo);
+    }
+
+    query += ' ORDER BY nucleo_name, line_code';
+
+    const result = await db.query(query, params);
+    res.json(result.rows);
+  } catch (error) {
+    next(error);
+  }
+});
+
+// GET /lines/:id - Get specific line with geometry
+router.get('/:id', async (req, res, next) => {
+  try {
+    const { id } = req.params;
+
+    const result = await db.query(
+      `SELECT
+        line_id,
+        line_code,
+        line_name,
+        nucleo_id,
+        nucleo_name,
+        color,
+        ST_AsGeoJSON(geometry) as geometry,
+        metadata
+      FROM train_lines
+      WHERE line_id = $1 OR line_code = $1`,
+      [id]
+    );
+
+    if (result.rows.length === 0) {
+      return res.status(404).json({ error: 'Line not found' });
+    }
+
+    const line = result.rows[0];
+    if (line.geometry) {
+      line.geometry = JSON.parse(line.geometry);
+    }
+
+    res.json(line);
+  } catch (error) {
+    next(error);
+  }
+});
+
+// GET /lines/:id/stations - Get stations on a line
+router.get('/:id/stations', async (req, res, next) => {
+  try {
+    const { id } = req.params;
+
+    // Get line first
+    const lineResult = await db.query(
+      `SELECT line_code FROM train_lines WHERE line_id = $1 OR line_code = $1`,
+      [id]
+    );
+
+    if (lineResult.rows.length === 0) {
+      return res.status(404).json({ error: 'Line not found' });
+    }
+
+    const lineCode = lineResult.rows[0].line_code;
+
+    // Get stations that have this line in their LINEAS metadata
+    const result = await db.query(
+      `SELECT
+        station_id,
+        station_code,
+        station_name,
+        latitude,
+        longitude,
+        station_type,
+        metadata
+      FROM stations
+      WHERE metadata->>'lineas' LIKE $1
+      ORDER BY station_name`,
+      [`%${lineCode}%`]
+    );
+
+    res.json(result.rows);
+  } catch (error) {
+    next(error);
+  }
+});
+
+// GET /lines/geojson - Get all lines as GeoJSON FeatureCollection
+router.get('/format/geojson', async (req, res, next) => {
+  try {
+    const { nucleo } = req.query;
+
+    let query = `
+      SELECT
+        line_id,
+        line_code,
+        line_name,
+        nucleo_id,
+        nucleo_name,
+        color,
+        ST_AsGeoJSON(geometry) as geometry
+      FROM train_lines
+      WHERE geometry IS NOT NULL
+    `;
+
+    const params = [];
+    if (nucleo) {
+      query += ' AND nucleo_id = $1';
+      params.push(nucleo);
+    }
+
+    const result = await db.query(query, params);
+
+    const features = result.rows.map(line => ({
+      type: 'Feature',
+      properties: {
+        id: line.line_id,
+        codigo: line.line_code,
+        nombre: line.line_name,
+        nucleo: line.nucleo_name,
+        color: line.color,
+      },
+      geometry: line.geometry ? JSON.parse(line.geometry) : null,
+    })).filter(f => f.geometry);
+
+    res.json({
+      type: 'FeatureCollection',
+      features,
+    });
+  } catch (error) {
+    next(error);
+  }
+});
+
+export default router;
--- a/backend/src/api/routes/punctuality.js
+++ b/backend/src/api/routes/punctuality.js
@@ -0,0 +1,267 @@
+import express from 'express';
+import db from '../../lib/db.js';
+
+const router = express.Router();
+
+// GET /punctuality/summary - Get overall punctuality summary
+router.get('/summary', async (req, res, next) => {
+  try {
+    const { days = 7 } = req.query;
+
+    const result = await db.query(`
+      SELECT
+        COUNT(*) as total_observations,
+        COUNT(DISTINCT train_id) as unique_trains,
+        COUNT(DISTINCT line_code) as unique_lines,
+        AVG(delay_minutes)::FLOAT as avg_delay_minutes,
+        PERCENTILE_CONT(0.5) WITHIN GROUP (ORDER BY delay_minutes)::FLOAT as median_delay_minutes,
+        MAX(delay_minutes) as max_delay_minutes,
+        COUNT(CASE WHEN delay_minutes = 0 THEN 1 END) as on_time_count,
+        COUNT(CASE WHEN delay_minutes > 0 AND delay_minutes <= 5 THEN 1 END) as minor_delay_count,
+        COUNT(CASE WHEN delay_minutes > 5 AND delay_minutes <= 15 THEN 1 END) as moderate_delay_count,
+        COUNT(CASE WHEN delay_minutes > 15 THEN 1 END) as severe_delay_count,
+        ROUND(
+          COUNT(CASE WHEN delay_minutes <= 5 THEN 1 END)::NUMERIC /
+          NULLIF(COUNT(*), 0) * 100,
+          2
+        ) as punctuality_percentage
+      FROM train_punctuality
+      WHERE recorded_at > NOW() - INTERVAL '1 day' * $1
+    `, [parseInt(days, 10)]);
+
+    res.json(result.rows[0] || {});
+  } catch (error) {
+    next(error);
+  }
+});
+
+// GET /punctuality/by-line - Get punctuality statistics by line
+router.get('/by-line', async (req, res, next) => {
+  try {
+    const { days = 7, limit = 50 } = req.query;
+
+    const result = await db.query(`
+      SELECT
+        line_code,
+        nucleo,
+        COUNT(*) as total_observations,
+        COUNT(DISTINCT train_id) as unique_trains,
+        AVG(delay_minutes)::FLOAT as avg_delay_minutes,
+        PERCENTILE_CONT(0.5) WITHIN GROUP (ORDER BY delay_minutes)::FLOAT as median_delay_minutes,
+        MAX(delay_minutes) as max_delay_minutes,
+        COUNT(CASE WHEN delay_minutes = 0 THEN 1 END) as on_time_count,
+        COUNT(CASE WHEN delay_minutes > 0 AND delay_minutes <= 5 THEN 1 END) as minor_delay_count,
+        COUNT(CASE WHEN delay_minutes > 5 AND delay_minutes <= 15 THEN 1 END) as moderate_delay_count,
+        COUNT(CASE WHEN delay_minutes > 15 THEN 1 END) as severe_delay_count,
+        ROUND(
+          COUNT(CASE WHEN delay_minutes <= 5 THEN 1 END)::NUMERIC /
+          NULLIF(COUNT(*), 0) * 100,
+          2
+        ) as punctuality_percentage
+      FROM train_punctuality
+      WHERE recorded_at > NOW() - INTERVAL '1 day' * $1
+        AND line_code IS NOT NULL
+      GROUP BY line_code, nucleo
+      HAVING COUNT(*) >= 10
+      ORDER BY punctuality_percentage ASC
+      LIMIT $2
+    `, [parseInt(days, 10), parseInt(limit, 10)]);
+
+    res.json(result.rows);
+  } catch (error) {
+    next(error);
+  }
+});
+
+// GET /punctuality/by-hour - Get punctuality pattern by hour of day
+router.get('/by-hour', async (req, res, next) => {
+  try {
+    const { days = 7, line_code } = req.query;
+
+    let query = `
+      SELECT
+        EXTRACT(HOUR FROM recorded_at)::INTEGER as hour_of_day,
+        COUNT(*) as total_observations,
+        AVG(delay_minutes)::FLOAT as avg_delay_minutes,
+        ROUND(
+          COUNT(CASE WHEN delay_minutes <= 5 THEN 1 END)::NUMERIC /
+          NULLIF(COUNT(*), 0) * 100,
+          2
+        ) as punctuality_percentage
+      FROM train_punctuality
+      WHERE recorded_at > NOW() - INTERVAL '1 day' * $1
+    `;
+
+    const params = [parseInt(days, 10)];
+
+    if (line_code) {
+      query += ` AND line_code = $2`;
+      params.push(line_code);
+    }
+
+    query += `
+      GROUP BY EXTRACT(HOUR FROM recorded_at)
+      ORDER BY hour_of_day
+    `;
+
+    const result = await db.query(query, params);
+
+    res.json(result.rows);
+  } catch (error) {
+    next(error);
+  }
+});
+
+// GET /punctuality/daily - Get daily punctuality trend
+router.get('/daily', async (req, res, next) => {
+  try {
+    const { days = 30, line_code } = req.query;
+
+    let query = `
+      SELECT
+        DATE(recorded_at) as date,
+        COUNT(*) as total_observations,
+        COUNT(DISTINCT train_id) as unique_trains,
+        AVG(delay_minutes)::FLOAT as avg_delay_minutes,
+        ROUND(
+          COUNT(CASE WHEN delay_minutes <= 5 THEN 1 END)::NUMERIC /
+          NULLIF(COUNT(*), 0) * 100,
+          2
+        ) as punctuality_percentage
+      FROM train_punctuality
+      WHERE recorded_at > NOW() - INTERVAL '1 day' * $1
+    `;
+
+    const params = [parseInt(days, 10)];
+
+    if (line_code) {
+      query += ` AND line_code = $2`;
+      params.push(line_code);
+    }
+
+    query += `
+      GROUP BY DATE(recorded_at)
+      ORDER BY date DESC
+    `;
+
+    const result = await db.query(query, params);
+
+    res.json(result.rows);
+  } catch (error) {
+    next(error);
+  }
+});
+
+// GET /punctuality/worst-lines - Get worst performing lines
+router.get('/worst-lines', async (req, res, next) => {
+  try {
+    const { days = 7, limit = 10 } = req.query;
+
+    const result = await db.query(`
+      SELECT * FROM get_worst_punctuality_lines($1, $2)
+    `, [parseInt(days, 10), parseInt(limit, 10)]);
+
+    res.json(result.rows);
+  } catch (error) {
+    next(error);
+  }
+});
+
+// GET /punctuality/line/:lineCode - Get detailed stats for a specific line
+router.get('/line/:lineCode', async (req, res, next) => {
+  try {
+    const { lineCode } = req.params;
+    const { days = 7 } = req.query;
+
+    const result = await db.query(`
+      SELECT * FROM get_line_punctuality_summary($1, $2)
+    `, [lineCode, parseInt(days, 10)]);
+
+    if (result.rows.length === 0) {
+      return res.status(404).json({ error: 'Line not found or no data available' });
+    }
+
+    res.json(result.rows[0]);
+  } catch (error) {
+    next(error);
+  }
+});
+
+// GET /punctuality/routes - Get punctuality by origin-destination pairs
+router.get('/routes', async (req, res, next) => {
+  try {
+    const { days = 7, limit = 50, line_code } = req.query;
+
+    let query = `
+      SELECT
+        origin_station_code,
+        destination_station_code,
+        line_code,
+        COUNT(*) as total_trips,
+        AVG(delay_minutes)::FLOAT as avg_delay_minutes,
+        MAX(delay_minutes) as max_delay_minutes,
+        ROUND(
+          COUNT(CASE WHEN delay_minutes <= 5 THEN 1 END)::NUMERIC /
+          NULLIF(COUNT(*), 0) * 100,
+          2
+        ) as punctuality_percentage
+      FROM train_punctuality
+      WHERE recorded_at > NOW() - INTERVAL '1 day' * $1
+        AND origin_station_code IS NOT NULL
+        AND destination_station_code IS NOT NULL
+    `;
+
+    const params = [parseInt(days, 10)];
+
+    if (line_code) {
+      query += ` AND line_code = $2`;
+      params.push(line_code);
+    }
+
+    query += `
+      GROUP BY origin_station_code, destination_station_code, line_code
+      HAVING COUNT(*) >= 5
+      ORDER BY punctuality_percentage ASC
+      LIMIT $${params.length + 1}
+    `;
+    params.push(parseInt(limit, 10));
+
+    const result = await db.query(query, params);
+
+    res.json(result.rows);
+  } catch (error) {
+    next(error);
+  }
+});
+
+// GET /punctuality/current-delays - Get trains currently delayed
+router.get('/current-delays', async (req, res, next) => {
+  try {
+    const { min_delay = 5 } = req.query;
+
+    const result = await db.query(`
+      SELECT DISTINCT ON (train_id)
+        train_id,
+        trip_id,
+        line_code,
+        nucleo,
+        origin_station_code,
+        destination_station_code,
+        current_station_code,
+        next_station_code,
+        delay_minutes,
+        platform,
+        recorded_at
+      FROM train_punctuality
+      WHERE recorded_at > NOW() - INTERVAL '10 minutes'
+        AND delay_minutes >= $1
+      ORDER BY train_id, recorded_at DESC
+    `, [parseInt(min_delay, 10)]);
+
+    res.json(result.rows);
+  } catch (error) {
+    next(error);
+  }
+});
+
+export default router;
--- a/backend/src/api/routes/routes.js
+++ b/backend/src/api/routes/routes.js
@@ -0,0 +1,42 @@
+import express from 'express';
+import db from '../../lib/db.js';
+
+const router = express.Router();
+
+// GET /routes - Get all routes
+router.get('/', async (req, res, next) => {
+  try {
+    const result = await db.query(`
+      SELECT * FROM routes
+      ORDER BY route_name
+    `);
+
+    res.json(result.rows);
+  } catch (error) {
+    next(error);
+  }
+});
+
+// GET /routes/:id - Get specific route
+router.get('/:id', async (req, res, next) => {
+  try {
+    const { id } = req.params;
+
+    const result = await db.query(
+      'SELECT * FROM routes WHERE route_id = $1',
+      [id]
+    );
+
+    if (result.rows.length === 0) {
+      return res.status(404).json({
+        error: 'Route not found',
+      });
+    }
+
+    res.json(result.rows[0]);
+  } catch (error) {
+    next(error);
+  }
+});
+
+export default router;
--- a/backend/src/api/routes/stations.js
+++ b/backend/src/api/routes/stations.js
@@ -0,0 +1,51 @@
+import express from 'express';
+import db from '../../lib/db.js';
+
+const router = express.Router();
+
+// GET /stations - Get all stations
+router.get('/', async (req, res, next) => {
+  try {
+    const { type } = req.query;
+
+    let query = 'SELECT * FROM stations';
+    const params = [];
+
+    if (type) {
+      query += ' WHERE station_type = $1';
+      params.push(type);
+    }
+
+    query += ' ORDER BY station_name';
+
+    const result = await db.query(query, params);
+
+    res.json(result.rows);
+  } catch (error) {
+    next(error);
+  }
+});
+
+// GET /stations/:id - Get specific station
+router.get('/:id', async (req, res, next) => {
+  try {
+    const { id } = req.params;
+
+    const result = await db.query(
+      'SELECT * FROM stations WHERE station_id = $1',
+      [id]
+    );
+
+    if (result.rows.length === 0) {
+      return res.status(404).json({
+        error: 'Station not found',
+      });
+    }
+
+    res.json(result.rows[0]);
+  } catch (error) {
+    next(error);
+  }
+});
+
+export default router;
--- a/backend/src/api/routes/stats.js
+++ b/backend/src/api/routes/stats.js
@@ -0,0 +1,70 @@
+import express from 'express';
+import db from '../../lib/db.js';
+import redis from '../../lib/redis.js';
+
+const router = express.Router();
+
+// GET /stats - Get system statistics
+router.get('/', async (req, res, next) => {
+  try {
+    // Get active trains count
+    const activeTrains = await redis.sMembers('trains:active');
+    const activeCount = activeTrains.length;
+
+    // Get last update time
+    const lastUpdate = await redis.get('stats:last_update');
+
+    // Get total trains in database
+    const totalResult = await db.query(
+      'SELECT COUNT(*) as total FROM trains'
+    );
+    const totalTrains = parseInt(totalResult.rows[0].total, 10);
+
+    // Get total positions stored
+    const positionsResult = await db.query(
+      'SELECT COUNT(*) as total FROM train_positions WHERE recorded_at > NOW() - INTERVAL \'24 hours\''
+    );
+    const positions24h = parseInt(positionsResult.rows[0].total, 10);
+
+    res.json({
+      active_trains: activeCount,
+      total_trains: totalTrains,
+      positions_24h: positions24h,
+      last_update: lastUpdate,
+      timestamp: new Date().toISOString(),
+    });
+  } catch (error) {
+    next(error);
+  }
+});
+
+// GET /stats/train/:id - Get statistics for specific train
+router.get('/train/:id', async (req, res, next) => {
+  try {
+    const { id } = req.params;
+    const { from, to } = req.query;
+
+    if (!from || !to) {
+      return res.status(400).json({
+        error: 'Missing required parameters: from, to',
+      });
+    }
+
+    const result = await db.query(
+      `SELECT * FROM calculate_train_statistics($1, $2, $3)`,
+      [id, new Date(from), new Date(to)]
+    );
+
+    if (result.rows.length === 0) {
+      return res.status(404).json({
+        error: 'No data found for this train in the specified period',
+      });
+    }
+
+    res.json(result.rows[0]);
+  } catch (error) {
+    next(error);
+  }
+});
+
+export default router;
--- a/backend/src/api/routes/trains.js
+++ b/backend/src/api/routes/trains.js
@@ -0,0 +1,321 @@
+import express from 'express';
+import db from '../../lib/db.js';
+import redis from '../../lib/redis.js';
+import logger from '../../lib/logger.js';
+
+const router = express.Router();
+
+// Normalize station code - Renfe uses codes with leading zeros (04040) but geojson has them without (4040)
+function normalizeStationCode(code) {
+  if (!code) return null;
+  // Remove leading zeros for lookup
+  return code.replace(/^0+/, '');
+}
+
+// Helper to get station names map from codes
+async function getStationNamesMap(stationCodes) {
+  if (!stationCodes || stationCodes.length === 0) return new Map();
+
+  const uniqueCodes = [...new Set(stationCodes.filter(Boolean))];
+  if (uniqueCodes.length === 0) return new Map();
+
+  // Create both original and normalized versions for lookup
+  const normalizedCodes = uniqueCodes.map(c => normalizeStationCode(c));
+  const allCodes = [...new Set([...uniqueCodes, ...normalizedCodes])];
+
+  const result = await db.query(
+    `SELECT station_code, station_name FROM stations WHERE station_code = ANY($1)`,
+    [allCodes]
+  );
+
+  // Build map that works with both original and normalized codes
+  const dbMap = new Map(result.rows.map(s => [s.station_code, s.station_name]));
+  const resultMap = new Map();
+
+  for (const code of uniqueCodes) {
+    // Try original code first, then normalized
+    const name = dbMap.get(code) || dbMap.get(normalizeStationCode(code));
+    if (name) {
+      resultMap.set(code, name);
+    }
+  }
+
+  return resultMap;
+}
+
+// GET /trains/current - Get all current train positions with fleet data
+router.get('/current', async (req, res, next) => {
+  try {
+    const trainIds = await redis.sMembers('trains:active');
+
+    if (trainIds.length === 0) {
+      return res.json([]);
+    }
+
+    // First pass: collect all positions and fleet data
+    const trainsData = await Promise.all(
+      trainIds.map(async (trainId) => {
+        const data = await redis.get(`trains:current:${trainId}`);
+        if (!data) return null;
+
+        const position = JSON.parse(data);
+        const fleetData = await redis.get(`fleet:${trainId}`);
+        const fleet = fleetData ? JSON.parse(fleetData) : null;
+
+        return { position, fleet };
+      })
+    );
+
+    const validTrains = trainsData.filter(t => t !== null);
+
+    // Collect all station codes to resolve names in one query
+    const allStationCodes = [];
+    for (const { fleet } of validTrains) {
+      if (fleet) {
+        allStationCodes.push(fleet.codEstAct, fleet.codEstSig, fleet.codEstDest, fleet.codEstOrig);
+      }
+    }
+
+    // Get station names map
+    const stationNames = await getStationNamesMap(allStationCodes);
+
+    // Build final response with station names
+    const positions = validTrains.map(({ position, fleet }) => {
+      if (fleet) {
+        return {
+          ...position,
+          codLinea: fleet.codLinea,
+          retrasoMin: fleet.retrasoMin,
+          codEstAct: fleet.codEstAct,
+          estacionActual: stationNames.get(fleet.codEstAct) || null,
+          codEstSig: fleet.codEstSig,
+          estacionSiguiente: stationNames.get(fleet.codEstSig) || null,
+          horaLlegadaSigEst: fleet.horaLlegadaSigEst,
+          codEstDest: fleet.codEstDest,
+          estacionDestino: stationNames.get(fleet.codEstDest) || null,
+          codEstOrig: fleet.codEstOrig,
+          estacionOrigen: stationNames.get(fleet.codEstOrig) || null,
+          nucleo: fleet.nucleo,
+          accesible: fleet.accesible,
+          via: fleet.via,
+        };
+      }
+      return position;
+    });
+
+    res.json(positions);
+  } catch (error) {
+    next(error);
+  }
+});
+
+// GET /trains/:id - Get specific train information with fleet data
+router.get('/:id', async (req, res, next) => {
+  try {
+    const { id } = req.params;
+
+    // Get current position from Redis
+    const currentData = await redis.get(`trains:current:${id}`);
+    const current = currentData ? JSON.parse(currentData) : null;
+
+    // Get fleet data from Renfe
+    const fleetData = await redis.get(`fleet:${id}`);
+    const fleet = fleetData ? JSON.parse(fleetData) : null;
+
+    // Get train info from database
+    const trainResult = await db.query(
+      'SELECT * FROM trains WHERE train_id = $1',
+      [id]
+    );
+
+    const train = trainResult.rows[0] || null;
+
+    if (!train && !current) {
+      return res.status(404).json({
+        error: 'Train not found',
+      });
+    }
+
+    // Resolve station names if we have fleet data
+    let currentStation = null;
+    let nextStation = null;
+    let destStation = null;
+    let origStation = null;
+
+    if (fleet) {
+      const stationCodes = [fleet.codEstAct, fleet.codEstSig, fleet.codEstDest, fleet.codEstOrig].filter(Boolean);
+      if (stationCodes.length > 0) {
+        const stationMap = await getStationNamesMap(stationCodes);
+        currentStation = stationMap.get(fleet.codEstAct);
+        nextStation = stationMap.get(fleet.codEstSig);
+        destStation = stationMap.get(fleet.codEstDest);
+        origStation = stationMap.get(fleet.codEstOrig);
+      }
+    }
+
+    res.json({
+      ...train,
+      current_position: current,
+      fleet_data: fleet ? {
+        codLinea: fleet.codLinea,
+        retrasoMin: fleet.retrasoMin,
+        codEstAct: fleet.codEstAct,
+        estacionActual: currentStation,
+        codEstSig: fleet.codEstSig,
+        estacionSiguiente: nextStation,
+        horaLlegadaSigEst: fleet.horaLlegadaSigEst,
+        codEstDest: fleet.codEstDest,
+        estacionDestino: destStation,
+        codEstOrig: fleet.codEstOrig,
+        estacionOrigen: origStation,
+        nucleo: fleet.nucleo,
+        accesible: fleet.accesible,
+        via: fleet.via,
+      } : null,
+    });
+  } catch (error) {
+    next(error);
+  }
+});
+
+// GET /trains/history/all - Get all train positions in a time range
+router.get('/history/all', async (req, res, next) => {
+  try {
+    const { from, to, limit = 5000 } = req.query;
+
+    // Default to last hour if no time range specified
+    const endTime = to ? new Date(to) : new Date();
+    const startTime = from ? new Date(from) : new Date(endTime.getTime() - 3600000);
+
+    const result = await db.query(
+      `SELECT
+        train_id,
+        latitude,
+        longitude,
+        bearing,
+        speed,
+        status,
+        occupancy_status,
+        trip_id,
+        timestamp,
+        recorded_at
+      FROM train_positions
+      WHERE timestamp >= $1 AND timestamp <= $2
+      ORDER BY timestamp ASC
+      LIMIT $3`,
+      [startTime, endTime, parseInt(limit, 10)]
+    );
+
+    // Convert latitude/longitude to numbers
+    const positions = result.rows.map(row => ({
+      ...row,
+      latitude: parseFloat(row.latitude),
+      longitude: parseFloat(row.longitude),
+    }));
+
+    res.json(positions);
+  } catch (error) {
+    next(error);
+  }
+});
+
+// GET /trains/:id/history - Get train position history
+router.get('/:id/history', async (req, res, next) => {
+  try {
+    const { id } = req.params;
+    const { from, to, limit = 100 } = req.query;
+
+    let query = `
+      SELECT
+        train_id,
+        latitude,
+        longitude,
+        bearing,
+        speed,
+        status,
+        timestamp,
+        recorded_at
+      FROM train_positions
+      WHERE train_id = $1
+    `;
+
+    const params = [id];
+    let paramIndex = 2;
+
+    if (from) {
+      query += ` AND timestamp >= $${paramIndex}`;
+      params.push(new Date(from));
+      paramIndex++;
+    }
+
+    if (to) {
+      query += ` AND timestamp <= $${paramIndex}`;
+      params.push(new Date(to));
+      paramIndex++;
+    }
+
+    query += ` ORDER BY timestamp DESC LIMIT $${paramIndex}`;
+    params.push(parseInt(limit, 10));
+
+    const result = await db.query(query, params);
+
+    res.json(result.rows);
+  } catch (error) {
+    next(error);
+  }
+});
+
+// GET /trains/:id/path - Get train path for visualization
+router.get('/:id/path', async (req, res, next) => {
+  try {
+    const { id } = req.params;
+    const { from, to } = req.query;
+
+    if (!from || !to) {
+      return res.status(400).json({
+        error: 'Missing required parameters: from, to',
+      });
+    }
+
+    const result = await db.query(
+      `SELECT * FROM get_train_path($1, $2, $3)`,
+      [id, new Date(from), new Date(to)]
+    );
+
+    res.json(result.rows);
+  } catch (error) {
+    next(error);
+  }
+});
+
+// GET /trains/area - Get trains in a geographic area
+router.get('/area', async (req, res, next) => {
+  try {
+    const { minLat, minLon, maxLat, maxLon, time } = req.query;
+
+    if (!minLat || !minLon || !maxLat || !maxLon) {
+      return res.status(400).json({
+        error: 'Missing required parameters: minLat, minLon, maxLat, maxLon',
+      });
+    }
+
+    const timestamp = time ? new Date(time) : new Date();
+
+    const result = await db.query(
+      `SELECT * FROM get_trains_in_area($1, $2, $3, $4, $5)`,
+      [
+        parseFloat(minLat),
+        parseFloat(minLon),
+        parseFloat(maxLat),
+        parseFloat(maxLon),
+        timestamp,
+      ]
+    );
+
+    res.json(result.rows);
+  } catch (error) {
+    next(error);
+  }
+});
+
+export default router;
--- a/backend/src/api/routes/trips.js
+++ b/backend/src/api/routes/trips.js
@@ -0,0 +1,213 @@
+import express from 'express';
+import db from '../../lib/db.js';
+import redis from '../../lib/redis.js';
+
+const router = express.Router();
+
+// GET /trips - Get all active trips for today
+router.get('/', async (req, res, next) => {
+  try {
+    const { route_id, service_id } = req.query;
+
+    let query = 'SELECT * FROM active_trips_today WHERE 1=1';
+    const params = [];
+    let paramIndex = 1;
+
+    if (route_id) {
+      query += ` AND route_id = $${paramIndex}`;
+      params.push(route_id);
+      paramIndex++;
+    }
+
+    if (service_id) {
+      query += ` AND service_id = $${paramIndex}`;
+      params.push(service_id);
+      paramIndex++;
+    }
+
+    query += ' ORDER BY trip_id';
+
+    const result = await db.query(query, params);
+
+    res.json(result.rows);
+  } catch (error) {
+    next(error);
+  }
+});
+
+// GET /trips/:id - Get specific trip details
+router.get('/:id', async (req, res, next) => {
+  try {
+    const { id } = req.params;
+
+    const tripResult = await db.query(
+      'SELECT * FROM trips WHERE trip_id = $1',
+      [id]
+    );
+
+    if (tripResult.rows.length === 0) {
+      return res.status(404).json({
+        error: 'Trip not found',
+      });
+    }
+
+    const trip = tripResult.rows[0];
+
+    // Get schedule using the function
+    const scheduleResult = await db.query(
+      'SELECT * FROM get_trip_schedule($1)',
+      [id]
+    );
+
+    res.json({
+      ...trip,
+      schedule: scheduleResult.rows,
+    });
+  } catch (error) {
+    next(error);
+  }
+});
+
+// GET /trips/:id/updates - Get real-time updates for a trip
+router.get('/:id/updates', async (req, res, next) => {
+  try {
+    const { id } = req.params;
+
+    // Get latest trip update
+    const updateResult = await db.query(`
+      SELECT
+        tu.*,
+        json_agg(
+          json_build_object(
+            'stop_sequence', stu.stop_sequence,
+            'stop_id', stu.stop_id,
+            'arrival_delay', stu.arrival_delay,
+            'departure_delay', stu.departure_delay,
+            'schedule_relationship', stu.schedule_relationship
+          ) ORDER BY stu.stop_sequence
+        ) as stop_time_updates
+      FROM trip_updates tu
+      LEFT JOIN stop_time_updates stu ON tu.update_id = stu.update_id
+      WHERE tu.trip_id = $1
+        AND tu.received_at > NOW() - INTERVAL '10 minutes'
+      GROUP BY tu.update_id
+      ORDER BY tu.received_at DESC
+      LIMIT 1
+    `, [id]);
+
+    if (updateResult.rows.length === 0) {
+      return res.json({
+        trip_id: id,
+        has_updates: false,
+        message: 'No recent updates available',
+      });
+    }
+
+    res.json({
+      trip_id: id,
+      has_updates: true,
+      ...updateResult.rows[0],
+    });
+  } catch (error) {
+    next(error);
+  }
+});
+
+// GET /trips/:id/delays - Get delay information for a trip
+router.get('/:id/delays', async (req, res, next) => {
+  try {
+    const { id } = req.params;
+
+    // Check Redis cache first
+    const cachedDelay = await redis.get(`trip:delay:${id}`);
+    if (cachedDelay) {
+      return res.json(JSON.parse(cachedDelay));
+    }
+
+    // Get from database
+    const result = await db.query(`
+      SELECT
+        trip_id,
+        delay_seconds,
+        schedule_relationship,
+        received_at,
+        CASE
+          WHEN delay_seconds IS NULL THEN 'NO_DATA'
+          WHEN delay_seconds = 0 THEN 'ON_TIME'
+          WHEN delay_seconds > 0 AND delay_seconds <= 300 THEN 'MINOR_DELAY'
+          WHEN delay_seconds > 300 AND delay_seconds <= 900 THEN 'MODERATE_DELAY'
+          WHEN delay_seconds > 900 THEN 'MAJOR_DELAY'
+          WHEN delay_seconds < 0 THEN 'EARLY'
+        END as delay_status,
+        CASE
+          WHEN delay_seconds >= 60 THEN
+            FLOOR(delay_seconds / 60) || ' min ' || MOD(delay_seconds::int, 60) || ' s'
+          WHEN delay_seconds IS NOT NULL THEN
+            delay_seconds || ' s'
+          ELSE 'N/A'
+        END as delay_formatted
+      FROM trip_updates
+      WHERE trip_id = $1
+        AND received_at > NOW() - INTERVAL '10 minutes'
+      ORDER BY received_at DESC
+      LIMIT 1
+    `, [id]);
+
+    if (result.rows.length === 0) {
+      return res.json({
+        trip_id: id,
+        delay_status: 'NO_DATA',
+        delay_seconds: null,
+        delay_formatted: 'N/A',
+        message: 'No recent delay information available',
+      });
+    }
+
+    const delayInfo = result.rows[0];
+
+    // Cache for 30 seconds
+    await redis.set(`trip:delay:${id}`, JSON.stringify(delayInfo), 30);
+
+    res.json(delayInfo);
+  } catch (error) {
+    next(error);
+  }
+});
+
+// GET /trips/route/:routeId - Get all trips for a specific route
+router.get('/route/:routeId', async (req, res, next) => {
+  try {
+    const { routeId } = req.params;
+
+    const result = await db.query(`
+      SELECT t.*
+      FROM trips t
+      WHERE t.route_id = $1
+      ORDER BY t.trip_id
+    `, [routeId]);
+
+    res.json(result.rows);
+  } catch (error) {
+    next(error);
+  }
+});
+
+// GET /trips/delayed - Get all currently delayed trips
+router.get('/delayed/all', async (req, res, next) => {
+  try {
+    const { min_delay } = req.query;
+    const minDelaySeconds = min_delay ? parseInt(min_delay, 10) : 0;
+
+    const result = await db.query(`
+      SELECT * FROM delayed_trips
+      WHERE delay_seconds >= $1
+      ORDER BY delay_seconds DESC
+    `, [minDelaySeconds]);
+
+    res.json(result.rows);
+  } catch (error) {
+    next(error);
+  }
+});
+
+export default router;
--- a/backend/src/api/server.js
+++ b/backend/src/api/server.js
@@ -0,0 +1,278 @@
+import express from 'express';
+import { createServer } from 'http';
+import { Server } from 'socket.io';
+import config from '../config/index.js';
+import logger from '../lib/logger.js';
+import db from '../lib/db.js';
+import redis from '../lib/redis.js';
+import {
+  rateLimiters,
+  helmetConfig,
+  hppProtection,
+  securityHeaders,
+  sanitizeRequest,
+  securityErrorHandler
+} from '../lib/security.js';
+import trainsRouter from './routes/trains.js';
+import routesRouter from './routes/routes.js';
+import stationsRouter from './routes/stations.js';
+import statsRouter from './routes/stats.js';
+import alertsRouter from './routes/alerts.js';
+import tripsRouter from './routes/trips.js';
+import analyticsRouter from './routes/analytics.js';
+import explorerRouter from './routes/explorer.js';
+import linesRouter from './routes/lines.js';
+import punctualityRouter from './routes/punctuality.js';
+import dashboardRouter from './routes/dashboard.js';
+
+class APIServer {
+  constructor() {
+    this.app = express();
+    this.httpServer = createServer(this.app);
+    this.io = new Server(this.httpServer, {
+      cors: {
+        origin: config.cors.origin,
+        methods: ['GET', 'POST'],
+      },
+    });
+    this.watchInterval = null;
+  }
+
+  setupMiddleware() {
+    // Trust proxy (for rate limiting behind nginx)
+    this.app.set('trust proxy', 1);
+
+    // Security headers (Helmet)
+    this.app.use(helmetConfig);
+
+    // Additional security headers
+    this.app.use(securityHeaders);
+
+    // HPP - HTTP Parameter Pollution protection
+    this.app.use(hppProtection);
+
+    // CORS
+    this.app.use((req, res, next) => {
+      const origin = req.headers.origin;
+      if (config.cors.origin.includes(origin) || config.cors.origin.includes('*')) {
+        res.header('Access-Control-Allow-Origin', origin);
+      }
+      res.header('Access-Control-Allow-Methods', 'GET, POST, OPTIONS');
+      res.header('Access-Control-Allow-Headers', 'Origin, X-Requested-With, Content-Type, Accept, Authorization');
+      res.header('Access-Control-Max-Age', '86400'); // 24 hours
+
+      // Handle preflight
+      if (req.method === 'OPTIONS') {
+        return res.sendStatus(204);
+      }
+      next();
+    });
+
+    // JSON parser with size limit
+    this.app.use(express.json({ limit: '1mb' }));
+    this.app.use(express.urlencoded({ extended: true, limit: '1mb' }));
+
+    // Request sanitization
+    this.app.use(sanitizeRequest);
+
+    // General rate limiting (skip in development if needed)
+    if (config.env === 'production' || config.security?.enableRateLimiting) {
+      this.app.use(rateLimiters.general);
+    }
+
+    // Request logging
+    this.app.use((req, res, next) => {
+      const start = Date.now();
+      res.on('finish', () => {
+        const duration = Date.now() - start;
+        logger.info({
+          method: req.method,
+          url: req.url,
+          status: res.statusCode,
+          duration: `${duration}ms`,
+          ip: req.ip,
+        }, 'HTTP Request');
+      });
+      next();
+    });
+  }
+
+  setupRoutes() {
+    // Health check (no rate limiting)
+    this.app.get('/health', (req, res) => {
+      res.json({
+        status: 'ok',
+        timestamp: new Date().toISOString(),
+        uptime: process.uptime(),
+        security: {
+          rateLimiting: config.env === 'production' || config.security?.enableRateLimiting,
+          helmet: true,
+          hpp: true
+        }
+      });
+    });
+
+    // API routes with rate limiting
+    this.app.use('/trains', trainsRouter);
+    this.app.use('/routes', routesRouter);
+    this.app.use('/stations', stationsRouter);
+    this.app.use('/stats', statsRouter);
+    this.app.use('/alerts', alertsRouter);
+    this.app.use('/trips', tripsRouter);
+    this.app.use('/lines', linesRouter);
+    this.app.use('/punctuality', punctualityRouter);
+    this.app.use('/dashboard', dashboardRouter);
+
+    // Analytics routes with stricter rate limiting
+    this.app.use('/analytics', rateLimiters.strict, analyticsRouter);
+
+    // Explorer routes with strict rate limiting
+    this.app.use('/explorer', rateLimiters.strict, explorerRouter);
+
+    // Security error handler
+    this.app.use(securityErrorHandler);
+
+    // 404 handler
+    this.app.use((req, res) => {
+      res.status(404).json({
+        error: 'Not Found',
+        path: req.url,
+      });
+    });
+
+    // Error handler
+    this.app.use((err, req, res, next) => {
+      // Don't expose stack trace in production
+      const errorResponse = {
+        error: err.message || 'Internal Server Error',
+      };
+
+      if (config.env !== 'production') {
+        errorResponse.stack = err.stack;
+      }
+
+      logger.error({ error: err.message, stack: err.stack }, 'API Error');
+      res.status(err.status || 500).json(errorResponse);
+    });
+  }
+
+  setupWebSocket() {
+    this.io.on('connection', (socket) => {
+      logger.info({ socketId: socket.id }, 'WebSocket client connected');
+
+      // Join default room
+      socket.join('trains');
+
+      // Handle subscribe to specific train
+      socket.on('subscribe:train', (trainId) => {
+        socket.join(`train:${trainId}`);
+        logger.debug({ socketId: socket.id, trainId }, 'Client subscribed to train');
+      });
+
+      // Handle unsubscribe from specific train
+      socket.on('unsubscribe:train', (trainId) => {
+        socket.leave(`train:${trainId}`);
+        logger.debug({ socketId: socket.id, trainId }, 'Client unsubscribed from train');
+      });
+
+      socket.on('disconnect', () => {
+        logger.info({ socketId: socket.id }, 'WebSocket client disconnected');
+      });
+    });
+
+    // Watch Redis for updates and broadcast via WebSocket
+    this.startRedisWatch();
+  }
+
+  async startRedisWatch() {
+    // Poll Redis every 2 seconds for changes
+    this.watchInterval = setInterval(async () => {
+      try {
+        const lastUpdate = await redis.get('stats:last_update');
+        if (!lastUpdate) return;
+
+        const trainIds = await redis.sMembers('trains:active');
+        if (trainIds.length === 0) return;
+
+        // Get all current positions
+        const positions = await Promise.all(
+          trainIds.map(async (trainId) => {
+            const data = await redis.get(`trains:current:${trainId}`);
+            return data ? JSON.parse(data) : null;
+          })
+        );
+
+        const validPositions = positions.filter(p => p !== null);
+
+        if (validPositions.length > 0) {
+          // Broadcast to all clients
+          this.io.to('trains').emit('trains:update', validPositions);
+
+          // Broadcast individual train updates
+          for (const position of validPositions) {
+            this.io.to(`train:${position.train_id}`).emit('train:update', position);
+          }
+        }
+
+      } catch (error) {
+        logger.error({ error: error.message }, 'Error in Redis watch');
+      }
+    }, 2000);
+  }
+
+  async start() {
+    // Connect to databases
+    await db.connect();
+    await redis.connect();
+
+    // Setup middleware and routes
+    this.setupMiddleware();
+    this.setupRoutes();
+    this.setupWebSocket();
+
+    // Start HTTP server
+    this.httpServer.listen(config.port, () => {
+      logger.info({
+        port: config.port,
+        env: config.env,
+      }, 'API Server started');
+    });
+  }
+
+  async stop() {
+    logger.info('Stopping API Server...');
+
+    if (this.watchInterval) {
+      clearInterval(this.watchInterval);
+      this.watchInterval = null;
+    }
+
+    this.io.close();
+    this.httpServer.close();
+    await db.disconnect();
+    await redis.disconnect();
+
+    logger.info('API Server stopped');
+  }
+}
+
+// Main execution
+const server = new APIServer();
+
+// Graceful shutdown
+const shutdown = async (signal) => {
+  logger.info({ signal }, 'Received shutdown signal');
+  await server.stop();
+  process.exit(0);
+};
+
+process.on('SIGTERM', () => shutdown('SIGTERM'));
+process.on('SIGINT', () => shutdown('SIGINT'));
+
+// Start server
+server.start().catch((error) => {
+  logger.fatal({ error }, 'Failed to start API server');
+  process.exit(1);
+});
+
+export default APIServer;
--- a/backend/src/config/index.js
+++ b/backend/src/config/index.js
@@ -0,0 +1,62 @@
+import dotenv from 'dotenv';
+
+dotenv.config();
+
+export const config = {
+  // Server
+  port: parseInt(process.env.PORT || '3000', 10),
+  env: process.env.NODE_ENV || 'development',
+  logLevel: process.env.LOG_LEVEL || 'info',
+
+  // Database
+  database: {
+    url: process.env.DATABASE_URL,
+    poolMin: 2,
+    poolMax: 10,
+  },
+
+  // Redis
+  redis: {
+    url: process.env.REDIS_URL,
+  },
+
+  // GTFS-RT
+  gtfsRT: {
+    vehiclePositionsUrl: process.env.GTFS_RT_URL || 'https://gtfsrt.renfe.com/vehicle_positions.pb',
+    tripUpdatesUrl: process.env.GTFS_TRIP_UPDATES_URL || 'https://gtfsrt.renfe.com/trip_updates_cercanias.pb',
+    alertsUrl: process.env.GTFS_ALERTS_URL || 'https://gtfsrt.renfe.com/alerts.pb',
+    pollingInterval: parseInt(process.env.POLLING_INTERVAL || '30000', 10),
+  },
+
+  // CORS
+  cors: {
+    origin: process.env.CORS_ORIGIN?.split(',') || ['http://localhost:3000'],
+  },
+
+  // JWT
+  jwt: {
+    secret: process.env.JWT_SECRET || 'default_secret_change_me',
+    expiresIn: '7d',
+  },
+
+  // Security
+  security: {
+    enableRateLimiting: process.env.ENABLE_RATE_LIMITING !== 'false',
+    rateLimits: {
+      general: {
+        windowMs: parseInt(process.env.RATE_LIMIT_WINDOW_MS || '900000', 10), // 15 minutes
+        max: parseInt(process.env.RATE_LIMIT_MAX || '1000', 10),
+      },
+      strict: {
+        windowMs: parseInt(process.env.RATE_LIMIT_STRICT_WINDOW_MS || '900000', 10),
+        max: parseInt(process.env.RATE_LIMIT_STRICT_MAX || '100', 10),
+      },
+      export: {
+        windowMs: parseInt(process.env.RATE_LIMIT_EXPORT_WINDOW_MS || '3600000', 10), // 1 hour
+        max: parseInt(process.env.RATE_LIMIT_EXPORT_MAX || '10', 10),
+      },
+    },
+  },
+};
+
+export default config;
--- a/backend/src/lib/db.js
+++ b/backend/src/lib/db.js
@@ -0,0 +1,62 @@
+import pg from 'pg';
+import config from '../config/index.js';
+import logger from './logger.js';
+
+const { Pool } = pg;
+
+class Database {
+  constructor() {
+    this.pool = null;
+  }
+
+  async connect() {
+    if (this.pool) {
+      return this.pool;
+    }
+
+    try {
+      this.pool = new Pool({
+        connectionString: config.database.url,
+        min: config.database.poolMin,
+        max: config.database.poolMax,
+      });
+
+      // Test connection
+      const client = await this.pool.connect();
+      logger.info('PostgreSQL connected successfully');
+      client.release();
+
+      return this.pool;
+    } catch (error) {
+      logger.error({ error }, 'Failed to connect to PostgreSQL');
+      throw error;
+    }
+  }
+
+  async query(text, params) {
+    if (!this.pool) {
+      await this.connect();
+    }
+
+    try {
+      const result = await this.pool.query(text, params);
+      return result;
+    } catch (error) {
+      logger.error({ error, query: text }, 'Database query error');
+      throw error;
+    }
+  }
+
+  async disconnect() {
+    if (this.pool) {
+      await this.pool.end();
+      logger.info('PostgreSQL disconnected');
+      this.pool = null;
+    }
+  }
+}
+
+// Singleton instance
+const db = new Database();
+
+export default db;
--- a/backend/src/lib/logger.js
+++ b/backend/src/lib/logger.js
@@ -0,0 +1,16 @@
+import pino from 'pino';
+import config from '../config/index.js';
+
+const logger = pino({
+  level: config.logLevel,
+  transport: config.env === 'development' ? {
+    target: 'pino-pretty',
+    options: {
+      colorize: true,
+      translateTime: 'SYS:standard',
+      ignore: 'pid,hostname',
+    },
+  } : undefined,
+});
+
+export default logger;
--- a/backend/src/lib/redis.js
+++ b/backend/src/lib/redis.js
@@ -0,0 +1,131 @@
+import { createClient } from 'redis';
+import config from '../config/index.js';
+import logger from './logger.js';
+
+class RedisClient {
+  constructor() {
+    this.client = null;
+  }
+
+  async connect() {
+    if (this.client?.isOpen) {
+      return this.client;
+    }
+
+    try {
+      this.client = createClient({
+        url: config.redis.url,
+      });
+
+      this.client.on('error', (err) => {
+        logger.error({ error: err }, 'Redis error');
+      });
+
+      this.client.on('connect', () => {
+        logger.info('Redis connecting...');
+      });
+
+      this.client.on('ready', () => {
+        logger.info('Redis connected successfully');
+      });
+
+      await this.client.connect();
+
+      return this.client;
+    } catch (error) {
+      logger.error({ error }, 'Failed to connect to Redis');
+      throw error;
+    }
+  }
+
+  async get(key) {
+    if (!this.client?.isOpen) {
+      await this.connect();
+    }
+
+    try {
+      return await this.client.get(key);
+    } catch (error) {
+      logger.error({ error, key }, 'Redis GET error');
+      throw error;
+    }
+  }
+
+  async set(key, value, options = {}) {
+    if (!this.client?.isOpen) {
+      await this.connect();
+    }
+
+    try {
+      return await this.client.set(key, value, options);
+    } catch (error) {
+      logger.error({ error, key }, 'Redis SET error');
+      throw error;
+    }
+  }
+
+  async del(key) {
+    if (!this.client?.isOpen) {
+      await this.connect();
+    }
+
+    try {
+      return await this.client.del(key);
+    } catch (error) {
+      logger.error({ error, key }, 'Redis DEL error');
+      throw error;
+    }
+  }
+
+  async keys(pattern) {
+    if (!this.client?.isOpen) {
+      await this.connect();
+    }
+
+    try {
+      return await this.client.keys(pattern);
+    } catch (error) {
+      logger.error({ error, pattern }, 'Redis KEYS error');
+      throw error;
+    }
+  }
+
+  async sAdd(key, ...members) {
+    if (!this.client?.isOpen) {
+      await this.connect();
+    }
+
+    try {
+      return await this.client.sAdd(key, members);
+    } catch (error) {
+      logger.error({ error, key }, 'Redis SADD error');
+      throw error;
+    }
+  }
+
+  async sMembers(key) {
+    if (!this.client?.isOpen) {
+      await this.connect();
+    }
+
+    try {
+      return await this.client.sMembers(key);
+    } catch (error) {
+      logger.error({ error, key }, 'Redis SMEMBERS error');
+      throw error;
+    }
+  }
+
+  async disconnect() {
+    if (this.client?.isOpen) {
+      await this.client.quit();
+      logger.info('Redis disconnected');
+      this.client = null;
+    }
+  }
+}
+
+// Singleton instance
+const redis = new RedisClient();
+
+export default redis;
--- a/backend/src/lib/security.js
+++ b/backend/src/lib/security.js
@@ -0,0 +1,319 @@
+import rateLimit from 'express-rate-limit';
+import helmet from 'helmet';
+import hpp from 'hpp';
+import { validationResult, query, param } from 'express-validator';
+import logger from './logger.js';
+
+// Rate limiting configurations
+export const rateLimiters = {
+  // General API rate limiter
+  general: rateLimit({
+    windowMs: 15 * 60 * 1000, // 15 minutes
+    max: 1000, // 1000 requests per 15 minutes
+    message: {
+      error: 'Too many requests',
+      message: 'You have exceeded the rate limit. Please try again later.',
+      retryAfter: '15 minutes'
+    },
+    standardHeaders: true,
+    legacyHeaders: false,
+    handler: (req, res, next, options) => {
+      logger.warn({
+        ip: req.ip,
+        path: req.path,
+        method: req.method
+      }, 'Rate limit exceeded');
+      res.status(429).json(options.message);
+    }
+  }),
+
+  // Strict rate limiter for heavy endpoints (analytics, export)
+  strict: rateLimit({
+    windowMs: 15 * 60 * 1000, // 15 minutes
+    max: 100, // 100 requests per 15 minutes
+    message: {
+      error: 'Too many requests',
+      message: 'This endpoint has stricter limits. Please try again later.',
+      retryAfter: '15 minutes'
+    },
+    standardHeaders: true,
+    legacyHeaders: false,
+    handler: (req, res, next, options) => {
+      logger.warn({
+        ip: req.ip,
+        path: req.path,
+        method: req.method
+      }, 'Strict rate limit exceeded');
+      res.status(429).json(options.message);
+    }
+  }),
+
+  // Very strict for export/heavy operations
+  export: rateLimit({
+    windowMs: 60 * 60 * 1000, // 1 hour
+    max: 10, // 10 exports per hour
+    message: {
+      error: 'Export limit reached',
+      message: 'You can only export 10 times per hour. Please try again later.',
+      retryAfter: '1 hour'
+    },
+    standardHeaders: true,
+    legacyHeaders: false
+  }),
+
+  // WebSocket connection limiter
+  websocket: rateLimit({
+    windowMs: 60 * 1000, // 1 minute
+    max: 10, // 10 connection attempts per minute
+    message: {
+      error: 'Too many connection attempts',
+      message: 'Please wait before trying to connect again.'
+    },
+    standardHeaders: true,
+    legacyHeaders: false
+  })
+};
+
+// Helmet security headers configuration
+export const helmetConfig = helmet({
+  contentSecurityPolicy: {
+    directives: {
+      defaultSrc: ["'self'"],
+      styleSrc: ["'self'", "'unsafe-inline'", "https://unpkg.com"],
+      scriptSrc: ["'self'", "https://unpkg.com"],
+      imgSrc: ["'self'", "data:", "https:", "blob:"],
+      connectSrc: ["'self'", "wss:", "ws:", "https://gtfsrt.renfe.com", "https://data.renfe.com"],
+      fontSrc: ["'self'", "https://fonts.gstatic.com"],
+      objectSrc: ["'none'"],
+      mediaSrc: ["'self'"],
+      frameSrc: ["'none'"]
+    }
+  },
+  crossOriginEmbedderPolicy: false, // Allow loading map tiles
+  crossOriginResourcePolicy: { policy: "cross-origin" }
+});
+
+// HPP - HTTP Parameter Pollution protection
+export const hppProtection = hpp({
+  whitelist: [
+    'route_id',
+    'train_id',
+    'station_id',
+    'type',
+    'severity',
+    'format'
+  ]
+});
+
+// Input validation rules
+export const validators = {
+  // Train ID validation
+  trainId: param('id')
+    .trim()
+    .notEmpty()
+    .withMessage('Train ID is required')
+    .isLength({ max: 100 })
+    .withMessage('Train ID too long')
+    .matches(/^[\w\-\.]+$/)
+    .withMessage('Invalid train ID format'),
+
+  // Route ID validation
+  routeId: param('routeId')
+    .trim()
+    .notEmpty()
+    .withMessage('Route ID is required')
+    .isLength({ max: 100 })
+    .withMessage('Route ID too long'),
+
+  // Station ID validation
+  stationId: param('stationId')
+    .trim()
+    .notEmpty()
+    .withMessage('Station ID is required')
+    .isLength({ max: 100 })
+    .withMessage('Station ID too long'),
+
+  // Pagination validation
+  pagination: [
+    query('limit')
+      .optional()
+      .isInt({ min: 1, max: 1000 })
+      .withMessage('Limit must be between 1 and 1000')
+      .toInt(),
+    query('offset')
+      .optional()
+      .isInt({ min: 0 })
+      .withMessage('Offset must be a positive integer')
+      .toInt()
+  ],
+
+  // Date range validation
+  dateRange: [
+    query('from')
+      .optional()
+      .isISO8601()
+      .withMessage('Invalid from date format (use ISO8601)'),
+    query('to')
+      .optional()
+      .isISO8601()
+      .withMessage('Invalid to date format (use ISO8601)')
+  ],
+
+  // Geographic bounds validation
+  geoBounds: [
+    query('minLat')
+      .optional()
+      .isFloat({ min: -90, max: 90 })
+      .withMessage('minLat must be between -90 and 90'),
+    query('maxLat')
+      .optional()
+      .isFloat({ min: -90, max: 90 })
+      .withMessage('maxLat must be between -90 and 90'),
+    query('minLon')
+      .optional()
+      .isFloat({ min: -180, max: 180 })
+      .withMessage('minLon must be between -180 and 180'),
+    query('maxLon')
+      .optional()
+      .isFloat({ min: -180, max: 180 })
+      .withMessage('maxLon must be between -180 and 180')
+  ],
+
+  // Heatmap parameters
+  heatmap: [
+    query('gridSize')
+      .optional()
+      .isFloat({ min: 0.001, max: 1 })
+      .withMessage('gridSize must be between 0.001 and 1'),
+    query('hours')
+      .optional()
+      .isInt({ min: 1, max: 168 })
+      .withMessage('hours must be between 1 and 168 (1 week)')
+  ],
+
+  // Alert filters
+  alertFilters: [
+    query('severity')
+      .optional()
+      .isIn(['LOW', 'MEDIUM', 'HIGH', 'CRITICAL'])
+      .withMessage('Invalid severity level'),
+    query('type')
+      .optional()
+      .isIn(['DELAY', 'CANCELLATION', 'INCIDENT', 'MAINTENANCE', 'OTHER'])
+      .withMessage('Invalid alert type')
+  ],
+
+  // Export format
+  exportFormat: [
+    query('format')
+      .optional()
+      .isIn(['json', 'csv', 'geojson'])
+      .withMessage('Format must be json, csv, or geojson'),
+    query('type')
+      .optional()
+      .isIn(['positions', 'routes', 'stations', 'alerts', 'statistics'])
+      .withMessage('Invalid export type')
+  ]
+};
+
+// Validation middleware
+export const validate = (validations) => {
+  return async (req, res, next) => {
+    // Run all validations
+    for (const validation of validations) {
+      const result = await validation.run(req);
+      if (!result.isEmpty()) break;
+    }
+
+    const errors = validationResult(req);
+    if (errors.isEmpty()) {
+      return next();
+    }
+
+    logger.warn({
+      path: req.path,
+      errors: errors.array()
+    }, 'Validation failed');
+
+    return res.status(400).json({
+      error: 'Validation Error',
+      details: errors.array().map(err => ({
+        field: err.path,
+        message: err.msg
+      }))
+    });
+  };
+};
+
+// Security headers middleware
+export const securityHeaders = (req, res, next) => {
+  // Remove X-Powered-By header
+  res.removeHeader('X-Powered-By');
+
+  // Add additional security headers
+  res.setHeader('X-Content-Type-Options', 'nosniff');
+  res.setHeader('X-Frame-Options', 'DENY');
+  res.setHeader('X-XSS-Protection', '1; mode=block');
+  res.setHeader('Referrer-Policy', 'strict-origin-when-cross-origin');
+  res.setHeader('Permissions-Policy', 'geolocation=(), microphone=(), camera=()');
+
+  next();
+};
+
+// Request sanitization middleware
+export const sanitizeRequest = (req, res, next) => {
+  // Sanitize query parameters
+  if (req.query) {
+    for (const key of Object.keys(req.query)) {
+      if (typeof req.query[key] === 'string') {
+        // Remove potential SQL injection patterns
+        req.query[key] = req.query[key]
+          .replace(/[;'"\\]/g, '')
+          .substring(0, 500); // Limit length
+      }
+    }
+  }
+
+  // Sanitize path parameters
+  if (req.params) {
+    for (const key of Object.keys(req.params)) {
+      if (typeof req.params[key] === 'string') {
+        req.params[key] = req.params[key]
+          .replace(/[;'"\\]/g, '')
+          .substring(0, 200);
+      }
+    }
+  }
+
+  next();
+};
+
+// Error handler for security issues
+export const securityErrorHandler = (err, req, res, next) => {
+  if (err.type === 'entity.too.large') {
+    return res.status(413).json({
+      error: 'Payload Too Large',
+      message: 'Request body exceeds size limit'
+    });
+  }
+
+  if (err.type === 'charset.unsupported') {
+    return res.status(415).json({
+      error: 'Unsupported Media Type',
+      message: 'Unsupported character encoding'
+    });
+  }
+
+  next(err);
+};
+
+export default {
+  rateLimiters,
+  helmetConfig,
+  hppProtection,
+  validators,
+  validate,
+  securityHeaders,
+  sanitizeRequest,
+  securityErrorHandler
+};
--- a/backend/src/worker/alerts-poller.js
+++ b/backend/src/worker/alerts-poller.js
@@ -0,0 +1,381 @@
+import GtfsRealtimeBindings from 'gtfs-realtime-bindings';
+import fetch from 'node-fetch';
+import config from '../config/index.js';
+import logger from '../lib/logger.js';
+import db from '../lib/db.js';
+import redis from '../lib/redis.js';
+
+class AlertsPoller {
+  constructor() {
+    this.isRunning = false;
+    this.pollInterval = null;
+    this.stats = {
+      totalPolls: 0,
+      successfulPolls: 0,
+      failedPolls: 0,
+      totalAlerts: 0,
+      lastPollTime: null,
+    };
+  }
+
+  async start() {
+    logger.info('Starting Service Alerts Poller...');
+
+    await db.connect();
+    await redis.connect();
+
+    this.isRunning = true;
+
+    // Initial poll
+    await this.poll();
+
+    // Setup polling interval
+    this.pollInterval = setInterval(
+      () => this.poll(),
+      config.gtfsRT.pollingInterval
+    );
+
+    logger.info({
+      interval: config.gtfsRT.pollingInterval,
+      url: config.gtfsRT.alertsUrl,
+    }, 'Service Alerts Poller started');
+  }
+
+  async poll() {
+    if (!this.isRunning) return;
+
+    this.stats.totalPolls++;
+    const startTime = Date.now();
+
+    try {
+      logger.debug('Polling Service Alerts feed...');
+
+      const response = await fetch(config.gtfsRT.alertsUrl, {
+        timeout: 10000,
+      });
+
+      if (!response.ok) {
+        throw new Error(`HTTP ${response.status}: ${response.statusText}`);
+      }
+
+      const buffer = await response.arrayBuffer();
+      const feed = GtfsRealtimeBindings.transit_realtime.FeedMessage.decode(
+        new Uint8Array(buffer)
+      );
+
+      logger.debug({
+        entities: feed.entity?.length || 0,
+      }, 'Service Alerts feed decoded');
+
+      const alerts = [];
+
+      for (const entity of feed.entity || []) {
+        if (entity.alert) {
+          const alert = this.parseAlert(entity);
+          if (alert) {
+            alerts.push(alert);
+          }
+        }
+      }
+
+      logger.info({
+        alerts: alerts.length,
+        duration: Date.now() - startTime,
+      }, 'Processed service alerts');
+
+      if (alerts.length > 0) {
+        await this.storeAlerts(alerts);
+        await this.updateRedisCache(alerts);
+      }
+
+      this.stats.successfulPolls++;
+      this.stats.totalAlerts = alerts.length;
+      this.stats.lastPollTime = new Date();
+
+    } catch (error) {
+      this.stats.failedPolls++;
+      logger.error({
+        error: error.message,
+        stack: error.stack,
+      }, 'Error polling Service Alerts feed');
+    }
+  }
+
+  parseAlert(entity) {
+    try {
+      const alert = entity.alert;
+
+      // Extract header and description
+      const headerText = this.extractText(alert.headerText);
+      const descriptionText = this.extractText(alert.descriptionText);
+      const url = this.extractText(alert.url);
+
+      // Extract informed entities
+      const informedEntities = [];
+      for (const ie of alert.informedEntity || []) {
+        informedEntities.push({
+          agency_id: ie.agencyId,
+          route_id: ie.routeId,
+          route_type: ie.routeType,
+          trip_id: ie.trip?.tripId,
+          stop_id: ie.stopId,
+        });
+      }
+
+      // Extract route and train IDs
+      const routeIds = informedEntities
+        .map(ie => ie.route_id)
+        .filter(Boolean);
+      const tripIds = informedEntities
+        .map(ie => ie.trip_id)
+        .filter(Boolean);
+
+      // Determine type
+      const alertType = this.determineAlertType(alert);
+
+      return {
+        alert_id: entity.id,
+        route_id: routeIds[0] || null,
+        train_id: tripIds[0] || null,
+        alert_type: alertType,
+        severity: this.mapSeverity(alert.severityLevel),
+        title: headerText,
+        description: descriptionText,
+        url: url,
+        header_text: headerText,
+        description_text: descriptionText,
+        cause: this.mapCause(alert.cause),
+        effect: this.mapEffect(alert.effect),
+        start_time: alert.activePeriod?.[0]?.start
+          ? new Date(alert.activePeriod[0].start * 1000)
+          : null,
+        end_time: alert.activePeriod?.[0]?.end
+          ? new Date(alert.activePeriod[0].end * 1000)
+          : null,
+        informed_entity: informedEntities,
+      };
+    } catch (error) {
+      logger.error({
+        error: error.message,
+        entity: entity.id,
+      }, 'Error parsing alert');
+      return null;
+    }
+  }
+
+  extractText(translation) {
+    if (!translation) return null;
+    if (translation.translation && translation.translation.length > 0) {
+      return translation.translation[0].text;
+    }
+    return null;
+  }
+
+  determineAlertType(alert) {
+    const effect = alert.effect;
+    const cause = alert.cause;
+
+    if (effect === 4) return 'CANCELLATION'; // NO_SERVICE
+    if (effect === 1) return 'DELAY'; // REDUCED_SERVICE
+    if (effect === 8) return 'MODIFIED_SERVICE'; // MODIFIED_SERVICE
+    if (cause === 9) return 'INCIDENT'; // ACCIDENT
+    if (cause === 10) return 'INCIDENT'; // MEDICAL_EMERGENCY
+
+    return 'INFO';
+  }
+
+  mapSeverity(level) {
+    const map = {
+      1: 'LOW',
+      2: 'MEDIUM',
+      3: 'HIGH',
+      4: 'CRITICAL',
+    };
+    return map[level] || 'MEDIUM';
+  }
+
+  mapCause(cause) {
+    const map = {
+      1: 'UNKNOWN_CAUSE',
+      2: 'OTHER_CAUSE',
+      3: 'TECHNICAL_PROBLEM',
+      4: 'STRIKE',
+      5: 'DEMONSTRATION',
+      6: 'ACCIDENT',
+      7: 'HOLIDAY',
+      8: 'WEATHER',
+      9: 'MAINTENANCE',
+      10: 'CONSTRUCTION',
+      11: 'POLICE_ACTIVITY',
+      12: 'MEDICAL_EMERGENCY',
+    };
+    return map[cause] || 'UNKNOWN_CAUSE';
+  }
+
+  mapEffect(effect) {
+    const map = {
+      1: 'NO_SERVICE',
+      2: 'REDUCED_SERVICE',
+      3: 'SIGNIFICANT_DELAYS',
+      4: 'DETOUR',
+      5: 'ADDITIONAL_SERVICE',
+      6: 'MODIFIED_SERVICE',
+      7: 'OTHER_EFFECT',
+      8: 'UNKNOWN_EFFECT',
+      9: 'STOP_MOVED',
+    };
+    return map[effect] || 'UNKNOWN_EFFECT';
+  }
+
+  async storeAlerts(alerts) {
+    const client = await db.pool.connect();
+
+    try {
+      await client.query('BEGIN');
+
+      for (const alert of alerts) {
+        // Check if alert already exists
+        const existingResult = await client.query(
+          'SELECT alert_id FROM alerts WHERE alert_id = $1',
+          [alert.alert_id]
+        );
+
+        if (existingResult.rows.length === 0) {
+          // Insert new alert
+          await client.query(`
+            INSERT INTO alerts (
+              route_id, train_id, alert_type, severity, title,
+              description, url, header_text, description_text,
+              cause, effect, start_time, end_time, informed_entity
+            )
+            VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12, $13, $14)
+          `, [
+            alert.route_id,
+            alert.train_id,
+            alert.alert_type,
+            alert.severity,
+            alert.title,
+            alert.description,
+            alert.url,
+            alert.header_text,
+            alert.description_text,
+            alert.cause,
+            alert.effect,
+            alert.start_time,
+            alert.end_time,
+            JSON.stringify(alert.informed_entity),
+          ]);
+        } else {
+          // Update existing alert
+          await client.query(`
+            UPDATE alerts
+            SET
+              alert_type = $2,
+              severity = $3,
+              title = $4,
+              description = $5,
+              url = $6,
+              header_text = $7,
+              description_text = $8,
+              cause = $9,
+              effect = $10,
+              end_time = $11,
+              informed_entity = $12,
+              updated_at = NOW()
+            WHERE alert_id = $1
+          `, [
+            alert.alert_id,
+            alert.alert_type,
+            alert.severity,
+            alert.title,
+            alert.description,
+            alert.url,
+            alert.header_text,
+            alert.description_text,
+            alert.cause,
+            alert.effect,
+            alert.end_time,
+            JSON.stringify(alert.informed_entity),
+          ]);
+        }
+      }
+
+      await client.query('COMMIT');
+
+      logger.debug({ count: alerts.length }, 'Alerts stored');
+
+    } catch (error) {
+      await client.query('ROLLBACK');
+      logger.error({ error: error.message }, 'Error storing alerts');
+      throw error;
+    } finally {
+      client.release();
+    }
+  }
+
+  async updateRedisCache(alerts) {
+    try {
+      // Clear previous active alerts
+      await redis.del('alerts:active');
+
+      // Store each alert
+      for (const alert of alerts) {
+        const key = `alert:${alert.alert_id}`;
+        await redis.set(key, JSON.stringify(alert), { EX: 600 }); // 10 min TTL
+
+        // Add to active alerts set
+        await redis.sAdd('alerts:active', alert.alert_id);
+
+        // Index by route
+        if (alert.route_id) {
+          await redis.sAdd(`alerts:route:${alert.route_id}`, alert.alert_id);
+        }
+
+        // Index by train
+        if (alert.train_id) {
+          await redis.sAdd(`alerts:train:${alert.train_id}`, alert.alert_id);
+        }
+      }
+
+      logger.debug({ count: alerts.length }, 'Redis cache updated');
+
+    } catch (error) {
+      logger.error({ error: error.message }, 'Error updating Redis cache');
+    }
+  }
+
+  async stop() {
+    logger.info('Stopping Service Alerts Poller...');
+
+    this.isRunning = false;
+
+    if (this.pollInterval) {
+      clearInterval(this.pollInterval);
+      this.pollInterval = null;
+    }
+
+    await db.disconnect();
+    await redis.disconnect();
+
+    logger.info('Service Alerts Poller stopped');
+  }
+}
+
+// Main execution
+const poller = new AlertsPoller();
+
+const shutdown = async (signal) => {
+  logger.info({ signal }, 'Received shutdown signal');
+  await poller.stop();
+  process.exit(0);
+};
+
+process.on('SIGTERM', () => shutdown('SIGTERM'));
+process.on('SIGINT', () => shutdown('SIGINT'));
+
+poller.start().catch((error) => {
+  logger.fatal({ error }, 'Failed to start Service Alerts Poller');
+  process.exit(1);
+});
+
+export default AlertsPoller;
--- a/backend/src/worker/analytics-refresher.js
+++ b/backend/src/worker/analytics-refresher.js
@@ -0,0 +1,125 @@
+import cron from 'node-cron';
+import db from '../lib/db.js';
+import logger from '../lib/logger.js';
+
+class AnalyticsRefresher {
+  constructor() {
+    this.schedule = process.env.ANALYTICS_REFRESH_SCHEDULE || '*/15 * * * *'; // Every 15 minutes
+    this.job = null;
+    this.isRefreshing = false;
+  }
+
+  async refreshViews() {
+    if (this.isRefreshing) {
+      logger.warn('Analytics refresh already in progress, skipping...');
+      return;
+    }
+
+    this.isRefreshing = true;
+    const startTime = Date.now();
+
+    try {
+      logger.info('Starting analytics views refresh...');
+
+      await db.query('SELECT refresh_all_analytics_views()');
+
+      const duration = Date.now() - startTime;
+      logger.info({
+        duration,
+        durationType: 'ms',
+      }, 'Analytics views refreshed successfully');
+
+    } catch (error) {
+      logger.error({
+        error: error.message,
+        stack: error.stack,
+      }, 'Error refreshing analytics views');
+    } finally {
+      this.isRefreshing = false;
+    }
+  }
+
+  async cleanupExports() {
+    try {
+      logger.info('Cleaning up old export requests...');
+
+      const result = await db.query('SELECT cleanup_old_export_requests() as deleted_count');
+      const deletedCount = result.rows[0].deleted_count;
+
+      logger.info({
+        deletedCount,
+      }, 'Export cleanup completed');
+
+    } catch (error) {
+      logger.error({
+        error: error.message,
+      }, 'Error cleaning up exports');
+    }
+  }
+
+  start() {
+    logger.info({
+      schedule: this.schedule,
+    }, 'Starting Analytics Refresher Worker');
+
+    // Refresh materialized views periodically
+    this.job = cron.schedule(this.schedule, async () => {
+      await this.refreshViews();
+    });
+
+    // Cleanup exports daily at 3 AM
+    cron.schedule('0 3 * * *', async () => {
+      await this.cleanupExports();
+    });
+
+    // Initial refresh
+    setTimeout(() => {
+      this.refreshViews();
+    }, 5000); // Wait 5 seconds after startup
+
+    logger.info('Analytics Refresher Worker started');
+  }
+
+  async stop() {
+    logger.info('Stopping Analytics Refresher Worker...');
+
+    if (this.job) {
+      this.job.stop();
+      this.job = null;
+    }
+
+    // Wait for any ongoing refresh to complete
+    while (this.isRefreshing) {
+      await new Promise(resolve => setTimeout(resolve, 1000));
+    }
+
+    await db.disconnect();
+    logger.info('Analytics Refresher Worker stopped');
+  }
+}
+
+// Main execution
+const worker = new AnalyticsRefresher();
+
+// Graceful shutdown
+const shutdown = async (signal) => {
+  logger.info({ signal }, 'Received shutdown signal');
+  await worker.stop();
+  process.exit(0);
+};
+
+process.on('SIGTERM', () => shutdown('SIGTERM'));
+process.on('SIGINT', () => shutdown('SIGINT'));
+
+// Start worker
+(async () => {
+  try {
+    await db.connect();
+    worker.start();
+  } catch (error) {
+    logger.fatal({ error }, 'Failed to start Analytics Refresher Worker');
+    process.exit(1);
+  }
+})();
+
+export default AnalyticsRefresher;
--- a/backend/src/worker/gtfs-poller.js
+++ b/backend/src/worker/gtfs-poller.js
@@ -0,0 +1,340 @@
+import GtfsRealtimeBindings from 'gtfs-realtime-bindings';
+import fetch from 'node-fetch';
+import config from '../config/index.js';
+import logger from '../lib/logger.js';
+import db from '../lib/db.js';
+import redis from '../lib/redis.js';
+
+class GTFSRealtimePoller {
+  constructor() {
+    this.isRunning = false;
+    this.pollInterval = null;
+    this.statsInterval = null;
+    this.stats = {
+      totalPolls: 0,
+      successfulPolls: 0,
+      failedPolls: 0,
+      totalTrains: 0,
+      lastPollTime: null,
+      errors: [],
+    };
+  }
+
+  async start() {
+    logger.info('Starting GTFS-RT Poller...');
+
+    // Connect to databases
+    await db.connect();
+    await redis.connect();
+
+    this.isRunning = true;
+
+    // Initial poll
+    await this.poll();
+
+    // Setup polling interval
+    this.pollInterval = setInterval(
+      () => this.poll(),
+      config.gtfsRT.pollingInterval
+    );
+
+    // Setup stats interval (every minute)
+    this.statsInterval = setInterval(
+      () => this.logStats(),
+      60000
+    );
+
+    logger.info({
+      interval: config.gtfsRT.pollingInterval,
+      url: config.gtfsRT.vehiclePositionsUrl,
+    }, 'GTFS-RT Poller started');
+  }
+
+  async poll() {
+    if (!this.isRunning) {
+      return;
+    }
+
+    this.stats.totalPolls++;
+    const startTime = Date.now();
+
+    try {
+      logger.debug('Polling GTFS-RT feed...');
+
+      // Fetch GTFS-RT feed
+      const response = await fetch(config.gtfsRT.vehiclePositionsUrl, {
+        timeout: 10000,
+      });
+
+      if (!response.ok) {
+        throw new Error(`HTTP ${response.status}: ${response.statusText}`);
+      }
+
+      const buffer = await response.arrayBuffer();
+      const feed = GtfsRealtimeBindings.transit_realtime.FeedMessage.decode(
+        new Uint8Array(buffer)
+      );
+
+      logger.debug({
+        entities: feed.entity?.length || 0,
+        header: feed.header,
+      }, 'GTFS-RT feed decoded');
+
+      // Process entities
+      const positions = [];
+      const trainIds = [];
+
+      for (const entity of feed.entity || []) {
+        if (entity.vehicle) {
+          const position = this.parseVehiclePosition(entity);
+          if (position) {
+            positions.push(position);
+            trainIds.push(position.train_id);
+          }
+        }
+      }
+
+      logger.info({
+        trains: positions.length,
+        duration: Date.now() - startTime,
+      }, 'Processed vehicle positions');
+
+      // Store positions
+      if (positions.length > 0) {
+        await this.storePositions(positions);
+        await this.updateRedisCache(positions, trainIds);
+      }
+
+      this.stats.successfulPolls++;
+      this.stats.totalTrains = positions.length;
+      this.stats.lastPollTime = new Date();
+
+    } catch (error) {
+      this.stats.failedPolls++;
+      this.stats.errors.push({
+        timestamp: new Date(),
+        message: error.message,
+      });
+
+      // Keep only last 10 errors
+      if (this.stats.errors.length > 10) {
+        this.stats.errors = this.stats.errors.slice(-10);
+      }
+
+      logger.error({
+        error: error.message,
+        stack: error.stack,
+        duration: Date.now() - startTime,
+      }, 'Error polling GTFS-RT feed');
+    }
+  }
+
+  parseVehiclePosition(entity) {
+    try {
+      const vehicle = entity.vehicle;
+      const position = vehicle.position;
+      const timestamp = vehicle.timestamp
+        ? new Date(vehicle.timestamp * 1000)
+        : new Date();
+
+      // Validate required fields
+      if (!position || position.latitude == null || position.longitude == null) {
+        logger.warn({ entity: entity.id }, 'Vehicle position missing coordinates');
+        return null;
+      }
+
+      // Validate coordinate ranges
+      if (
+        position.latitude < -90 || position.latitude > 90 ||
+        position.longitude < -180 || position.longitude > 180
+      ) {
+        logger.warn({
+          lat: position.latitude,
+          lon: position.longitude,
+        }, 'Invalid coordinates');
+        return null;
+      }
+
+      return {
+        train_id: vehicle.vehicle?.id || entity.id,
+        trip_id: vehicle.trip?.tripId || null,
+        route_id: vehicle.trip?.routeId || null,
+        latitude: position.latitude,
+        longitude: position.longitude,
+        bearing: position.bearing || null,
+        speed: position.speed ? position.speed * 3.6 : null, // Convert m/s to km/h
+        status: this.mapVehicleStatus(vehicle.currentStatus),
+        occupancy_status: this.mapOccupancyStatus(vehicle.occupancyStatus),
+        timestamp: timestamp,
+        recorded_at: new Date(),
+      };
+    } catch (error) {
+      logger.error({
+        error: error.message,
+        entity: entity.id,
+      }, 'Error parsing vehicle position');
+      return null;
+    }
+  }
+
+  mapVehicleStatus(status) {
+    const statusMap = {
+      0: 'INCOMING_AT',
+      1: 'STOPPED_AT',
+      2: 'IN_TRANSIT_TO',
+    };
+    return statusMap[status] || 'UNKNOWN';
+  }
+
+  mapOccupancyStatus(status) {
+    const occupancyMap = {
+      0: 'EMPTY',
+      1: 'MANY_SEATS_AVAILABLE',
+      2: 'FEW_SEATS_AVAILABLE',
+      3: 'STANDING_ROOM_ONLY',
+      4: 'CRUSHED_STANDING_ROOM_ONLY',
+      5: 'FULL',
+      6: 'NOT_ACCEPTING_PASSENGERS',
+    };
+    return occupancyMap[status] || null;
+  }
+
+  async storePositions(positions) {
+    const client = await db.pool.connect();
+
+    try {
+      await client.query('BEGIN');
+
+      // Batch insert positions
+      const values = positions.map((p, idx) => {
+        const offset = idx * 12;
+        return `($${offset + 1}, $${offset + 2}, $${offset + 3}, $${offset + 4}, $${offset + 5}, $${offset + 6}, $${offset + 7}, $${offset + 8}, $${offset + 9}, $${offset + 10}, $${offset + 11}, $${offset + 12})`;
+      }).join(',');
+
+      const params = positions.flatMap(p => [
+        p.train_id,
+        p.trip_id,
+        p.route_id,
+        p.latitude,
+        p.longitude,
+        p.bearing,
+        p.speed,
+        p.status,
+        p.occupancy_status,
+        p.timestamp,
+        p.recorded_at,
+        `SRID=4326;POINT(${p.longitude} ${p.latitude})`,
+      ]);
+
+      await client.query(`
+        INSERT INTO train_positions (
+          train_id, trip_id, route_id, latitude, longitude, bearing, speed,
+          status, occupancy_status, timestamp, recorded_at, position
+        )
+        VALUES ${values}
+      `, params);
+
+      // Update trains table (upsert)
+      for (const p of positions) {
+        await client.query(`
+          INSERT INTO trains (train_id, route_id, train_type, last_seen, is_active)
+          VALUES ($1, $2, 'UNKNOWN', $3, true)
+          ON CONFLICT (train_id) DO UPDATE
+          SET last_seen = $3, is_active = true, route_id = COALESCE(trains.route_id, $2)
+        `, [p.train_id, p.route_id, p.recorded_at]);
+      }
+
+      await client.query('COMMIT');
+
+      logger.debug({ count: positions.length }, 'Positions stored in PostgreSQL');
+
+    } catch (error) {
+      await client.query('ROLLBACK');
+      logger.error({ error: error.message }, 'Error storing positions');
+      throw error;
+    } finally {
+      client.release();
+    }
+  }
+
+  async updateRedisCache(positions, trainIds) {
+    try {
+      // Store each position in Redis with 5-minute expiration
+      const promises = positions.map(async (p) => {
+        const key = `trains:current:${p.train_id}`;
+        await redis.set(key, JSON.stringify(p), { EX: 300 });
+      });
+
+      await Promise.all(promises);
+
+      // Update active trains set
+      if (trainIds.length > 0) {
+        await redis.del('trains:active');
+        await redis.sAdd('trains:active', ...trainIds);
+      }
+
+      // Store last update timestamp
+      await redis.set('stats:last_update', new Date().toISOString());
+
+      logger.debug({ count: positions.length }, 'Redis cache updated');
+
+    } catch (error) {
+      logger.error({ error: error.message }, 'Error updating Redis cache');
+      // Don't throw - Redis cache is not critical
+    }
+  }
+
+  logStats() {
+    const successRate = this.stats.totalPolls > 0
+      ? ((this.stats.successfulPolls / this.stats.totalPolls) * 100).toFixed(2)
+      : 0;
+
+    logger.info({
+      ...this.stats,
+      successRate: `${successRate}%`,
+      recentErrors: this.stats.errors.slice(-3),
+    }, 'Poller statistics');
+  }
+
+  async stop() {
+    logger.info('Stopping GTFS-RT Poller...');
+
+    this.isRunning = false;
+
+    if (this.pollInterval) {
+      clearInterval(this.pollInterval);
+      this.pollInterval = null;
+    }
+
+    if (this.statsInterval) {
+      clearInterval(this.statsInterval);
+      this.statsInterval = null;
+    }
+
+    await db.disconnect();
+    await redis.disconnect();
+
+    logger.info('GTFS-RT Poller stopped');
+  }
+}
+
+// Main execution
+const poller = new GTFSRealtimePoller();
+
+// Graceful shutdown
+const shutdown = async (signal) => {
+  logger.info({ signal }, 'Received shutdown signal');
+  await poller.stop();
+  process.exit(0);
+};
+
+process.on('SIGTERM', () => shutdown('SIGTERM'));
+process.on('SIGINT', () => shutdown('SIGINT'));
+
+// Start poller
+poller.start().catch((error) => {
+  logger.fatal({ error }, 'Failed to start poller');
+  process.exit(1);
+});
+
+export default GTFSRealtimePoller;
--- a/backend/src/worker/gtfs-static-syncer.js
+++ b/backend/src/worker/gtfs-static-syncer.js
@@ -0,0 +1,522 @@
+import fetch from 'node-fetch';
+import { createWriteStream, createReadStream } from 'fs';
+import { pipeline } from 'stream/promises';
+import { createHash } from 'crypto';
+import { parse } from 'csv-parse';
+import { unlink, mkdir } from 'fs/promises';
+import { createGunzip } from 'zlib';
+import { Extract } from 'unzipper';
+import { join } from 'path';
+import config from '../config/index.js';
+import logger from '../lib/logger.js';
+import db from '../lib/db.js';
+import redis from '../lib/redis.js';
+
+class GTFSStaticSyncer {
+  constructor() {
+    this.tmpDir = '/tmp/gtfs';
+    this.gtfsUrl = process.env.GTFS_STATIC_URL || 'https://data.renfe.com/api/gtfs/latest.zip';
+    this.syncInterval = null;
+  }
+
+  async start() {
+    logger.info('Starting GTFS Static Syncer...');
+
+    await db.connect();
+    await redis.connect();
+
+    // Initial sync (don't crash if it fails, just log and continue)
+    try {
+      await this.sync();
+    } catch (error) {
+      logger.warn({ error: error.message }, 'Initial GTFS sync failed, will retry at scheduled time');
+    }
+
+    // Schedule daily sync at 3 AM
+    const now = new Date();
+    const next3AM = new Date();
+    next3AM.setHours(3, 0, 0, 0);
+    if (next3AM <= now) {
+      next3AM.setDate(next3AM.getDate() + 1);
+    }
+
+    const msUntil3AM = next3AM - now;
+
+    setTimeout(() => {
+      this.sync();
+      // Then sync every 24 hours
+      this.syncInterval = setInterval(() => this.sync(), 24 * 60 * 60 * 1000);
+    }, msUntil3AM);
+
+    logger.info({
+      nextSync: next3AM.toISOString(),
+      msUntil: msUntil3AM,
+    }, 'GTFS Static Syncer scheduled');
+  }
+
+  async sync() {
+    const startTime = Date.now();
+    logger.info('Starting GTFS Static synchronization...');
+
+    try {
+      // Ensure tmp directory exists
+      await mkdir(this.tmpDir, { recursive: true });
+
+      // Download GTFS zip
+      const zipPath = await this.downloadGTFS();
+
+      // Calculate checksum
+      const checksum = await this.calculateChecksum(zipPath);
+
+      // Check if already imported
+      const existingResult = await db.query(
+        'SELECT feed_id FROM gtfs_feeds WHERE feed_checksum = $1',
+        [checksum]
+      );
+
+      if (existingResult.rows.length > 0) {
+        logger.info({ checksum }, 'GTFS feed already imported, skipping');
+        await unlink(zipPath);
+        return;
+      }
+
+      // Extract zip
+      const extractPath = await this.extractZip(zipPath);
+
+      // Parse GTFS files
+      const data = await this.parseGTFSFiles(extractPath);
+
+      // Import to database
+      await this.importToDatabase(data, checksum);
+
+      // Cleanup
+      await unlink(zipPath);
+
+      const duration = Date.now() - startTime;
+      logger.info({
+        duration,
+        checksum,
+        stats: {
+          routes: data.routes?.length || 0,
+          trips: data.trips?.length || 0,
+          stops: data.stops?.length || 0,
+          stopTimes: data.stopTimes?.length || 0,
+        },
+      }, 'GTFS Static synchronization completed');
+
+      // Invalidate cache
+      await this.invalidateCaches();
+
+    } catch (error) {
+      logger.error({
+        error: error.message,
+        stack: error.stack,
+      }, 'Error synchronizing GTFS Static');
+      throw error;
+    }
+  }
+
+  async downloadGTFS() {
+    const zipPath = join(this.tmpDir, 'gtfs.zip');
+
+    logger.info({ url: this.gtfsUrl }, 'Downloading GTFS feed...');
+
+    const response = await fetch(this.gtfsUrl);
+    if (!response.ok) {
+      throw new Error(`Failed to download GTFS: ${response.status} ${response.statusText}`);
+    }
+
+    await pipeline(
+      response.body,
+      createWriteStream(zipPath)
+    );
+
+    logger.info({ path: zipPath }, 'GTFS feed downloaded');
+    return zipPath;
+  }
+
+  async calculateChecksum(filePath) {
+    const hash = createHash('sha256');
+    await pipeline(
+      createReadStream(filePath),
+      hash
+    );
+    return hash.digest('hex');
+  }
+
+  async extractZip(zipPath) {
+    const extractPath = join(this.tmpDir, 'extracted');
+
+    logger.info('Extracting GTFS zip...');
+
+    await pipeline(
+      createReadStream(zipPath),
+      Extract({ path: extractPath })
+    );
+
+    logger.info({ path: extractPath }, 'GTFS zip extracted');
+    return extractPath;
+  }
+
+  async parseGTFSFiles(extractPath) {
+    logger.info('Parsing GTFS files...');
+
+    const data = {
+      routes: await this.parseCSV(join(extractPath, 'routes.txt')),
+      trips: await this.parseCSV(join(extractPath, 'trips.txt')),
+      stops: await this.parseCSV(join(extractPath, 'stops.txt')),
+      stopTimes: await this.parseCSV(join(extractPath, 'stop_times.txt')),
+      calendar: await this.parseCSV(join(extractPath, 'calendar.txt')),
+      calendarDates: await this.parseCSV(join(extractPath, 'calendar_dates.txt')),
+      shapes: await this.parseCSV(join(extractPath, 'shapes.txt')),
+    };
+
+    logger.info('GTFS files parsed');
+    return data;
+  }
+
+  async parseCSV(filePath) {
+    const records = [];
+
+    try {
+      await pipeline(
+        createReadStream(filePath),
+        parse({
+          columns: true,
+          skip_empty_lines: true,
+          trim: true,
+        }),
+        async function* (source) {
+          for await (const record of source) {
+            records.push(record);
+          }
+        }
+      );
+    } catch (error) {
+      logger.warn({ file: filePath, error: error.message }, 'Optional GTFS file not found');
+    }
+
+    return records;
+  }
+
+  async importToDatabase(data, checksum) {
+    const client = await db.pool.connect();
+
+    try {
+      await client.query('BEGIN');
+
+      logger.info('Importing GTFS data to database...');
+
+      // Create feed record
+      const feedResult = await client.query(`
+        INSERT INTO gtfs_feeds (feed_checksum, feed_url, imported_at)
+        VALUES ($1, $2, NOW())
+        RETURNING feed_id
+      `, [checksum, this.gtfsUrl]);
+
+      const feedId = feedResult.rows[0].feed_id;
+
+      // Import routes (update existing)
+      if (data.routes && data.routes.length > 0) {
+        logger.info({ count: data.routes.length }, 'Importing routes...');
+        for (const route of data.routes) {
+          await client.query(`
+            INSERT INTO routes (
+              route_id, route_name, route_short_name, route_type,
+              color, description, metadata
+            )
+            VALUES ($1, $2, $3, $4, $5, $6, $7)
+            ON CONFLICT (route_id) DO UPDATE
+            SET
+              route_name = EXCLUDED.route_name,
+              route_short_name = EXCLUDED.route_short_name,
+              route_type = EXCLUDED.route_type,
+              color = EXCLUDED.color,
+              description = EXCLUDED.description,
+              updated_at = NOW()
+          `, [
+            route.route_id,
+            route.route_long_name || route.route_short_name,
+            route.route_short_name,
+            this.mapRouteType(route.route_type),
+            route.route_color ? '#' + route.route_color : null,
+            route.route_desc,
+            JSON.stringify({
+              gtfs_route_type: route.route_type,
+              text_color: route.route_text_color,
+            }),
+          ]);
+        }
+      }
+
+      // Import stops (update existing stations)
+      if (data.stops && data.stops.length > 0) {
+        logger.info({ count: data.stops.length }, 'Importing stops...');
+        for (const stop of data.stops) {
+          await client.query(`
+            INSERT INTO stations (
+              station_id, station_name, station_code,
+              latitude, longitude, position, station_type, metadata
+            )
+            VALUES ($1, $2, $3, $4, $5, ST_SetSRID(ST_MakePoint($5, $4), 4326)::geography, $6, $7)
+            ON CONFLICT (station_id) DO UPDATE
+            SET
+              station_name = EXCLUDED.station_name,
+              latitude = EXCLUDED.latitude,
+              longitude = EXCLUDED.longitude,
+              position = EXCLUDED.position,
+              metadata = EXCLUDED.metadata,
+              updated_at = NOW()
+          `, [
+            stop.stop_id,
+            stop.stop_name,
+            stop.stop_code,
+            parseFloat(stop.stop_lat),
+            parseFloat(stop.stop_lon),
+            this.mapStationType(stop.location_type),
+            JSON.stringify({
+              location_type: stop.location_type,
+              parent_station: stop.parent_station,
+              wheelchair_boarding: stop.wheelchair_boarding,
+              platform_code: stop.platform_code,
+            }),
+          ]);
+        }
+      }
+
+      // Import trips
+      if (data.trips && data.trips.length > 0) {
+        logger.info({ count: data.trips.length }, 'Importing trips...');
+
+        // Batch insert trips
+        const tripValues = data.trips.map((trip, idx) => {
+          const offset = idx * 10;
+          return `($${offset + 1}, $${offset + 2}, $${offset + 3}, $${offset + 4}, $${offset + 5}, $${offset + 6}, $${offset + 7}, $${offset + 8}, $${offset + 9}, $${offset + 10})`;
+        }).join(',');
+
+        const tripParams = data.trips.flatMap(trip => [
+          trip.trip_id,
+          trip.route_id,
+          trip.service_id,
+          trip.trip_headsign,
+          trip.trip_short_name,
+          parseInt(trip.direction_id) || null,
+          trip.block_id,
+          trip.shape_id,
+          parseInt(trip.wheelchair_accessible) || null,
+          parseInt(trip.bikes_allowed) || null,
+        ]);
+
+        await client.query(`
+          INSERT INTO trips (
+            trip_id, route_id, service_id, trip_headsign, trip_short_name,
+            direction_id, block_id, shape_id, wheelchair_accessible, bikes_allowed
+          )
+          VALUES ${tripValues}
+          ON CONFLICT (trip_id) DO UPDATE
+          SET
+            route_id = EXCLUDED.route_id,
+            service_id = EXCLUDED.service_id,
+            trip_headsign = EXCLUDED.trip_headsign,
+            updated_at = NOW()
+        `, tripParams);
+      }
+
+      // Import stop_times (batch insert)
+      if (data.stopTimes && data.stopTimes.length > 0) {
+        logger.info({ count: data.stopTimes.length }, 'Importing stop times...');
+
+        // Delete old stop_times
+        await client.query('DELETE FROM stop_times');
+
+        // Batch insert in chunks of 1000
+        const chunkSize = 1000;
+        for (let i = 0; i < data.stopTimes.length; i += chunkSize) {
+          const chunk = data.stopTimes.slice(i, i + chunkSize);
+
+          const values = chunk.map((_, idx) => {
+            const offset = idx * 6;
+            return `($${offset + 1}, $${offset + 2}, $${offset + 3}, $${offset + 4}, $${offset + 5}, $${offset + 6})`;
+          }).join(',');
+
+          const params = chunk.flatMap(st => [
+            st.trip_id,
+            st.arrival_time,
+            st.departure_time,
+            st.stop_id,
+            parseInt(st.stop_sequence),
+            parseInt(st.pickup_type) || null,
+          ]);
+
+          await client.query(`
+            INSERT INTO stop_times (
+              trip_id, arrival_time, departure_time, stop_id, stop_sequence, pickup_type
+            )
+            VALUES ${values}
+          `, params);
+        }
+      }
+
+      // Import calendar
+      if (data.calendar && data.calendar.length > 0) {
+        logger.info({ count: data.calendar.length }, 'Importing calendar...');
+
+        for (const cal of data.calendar) {
+          await client.query(`
+            INSERT INTO calendar (
+              service_id, monday, tuesday, wednesday, thursday,
+              friday, saturday, sunday, start_date, end_date
+            )
+            VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10)
+            ON CONFLICT (service_id) DO UPDATE
+            SET
+              monday = EXCLUDED.monday,
+              tuesday = EXCLUDED.tuesday,
+              wednesday = EXCLUDED.wednesday,
+              thursday = EXCLUDED.thursday,
+              friday = EXCLUDED.friday,
+              saturday = EXCLUDED.saturday,
+              sunday = EXCLUDED.sunday,
+              start_date = EXCLUDED.start_date,
+              end_date = EXCLUDED.end_date
+          `, [
+            cal.service_id,
+            cal.monday === '1',
+            cal.tuesday === '1',
+            cal.wednesday === '1',
+            cal.thursday === '1',
+            cal.friday === '1',
+            cal.saturday === '1',
+            cal.sunday === '1',
+            cal.start_date,
+            cal.end_date,
+          ]);
+        }
+      }
+
+      // Import calendar_dates
+      if (data.calendarDates && data.calendarDates.length > 0) {
+        logger.info({ count: data.calendarDates.length }, 'Importing calendar dates...');
+
+        await client.query('DELETE FROM calendar_dates');
+
+        for (const cd of data.calendarDates) {
+          await client.query(`
+            INSERT INTO calendar_dates (service_id, date, exception_type)
+            VALUES ($1, $2, $3)
+          `, [cd.service_id, cd.date, parseInt(cd.exception_type)]);
+        }
+      }
+
+      // Import shapes
+      if (data.shapes && data.shapes.length > 0) {
+        logger.info({ count: data.shapes.length }, 'Importing shapes...');
+
+        await client.query('DELETE FROM shapes');
+
+        const chunkSize = 1000;
+        for (let i = 0; i < data.shapes.length; i += chunkSize) {
+          const chunk = data.shapes.slice(i, i + chunkSize);
+
+          const values = chunk.map((_, idx) => {
+            const offset = idx * 5;
+            return `($${offset + 1}, $${offset + 2}, $${offset + 3}, $${offset + 4}, ST_SetSRID(ST_MakePoint($${offset + 3}, $${offset + 2}), 4326)::geography)`;
+          }).join(',');
+
+          const params = chunk.flatMap(shape => [
+            shape.shape_id,
+            parseFloat(shape.shape_pt_lat),
+            parseFloat(shape.shape_pt_lon),
+            parseInt(shape.shape_pt_sequence),
+            parseFloat(shape.shape_dist_traveled) || null,
+          ]);
+
+          await client.query(`
+            INSERT INTO shapes (shape_id, shape_pt_lat, shape_pt_lon, shape_pt_sequence, shape_dist_traveled, geom)
+            VALUES ${values}
+          `, params);
+        }
+      }
+
+      await client.query('COMMIT');
+      logger.info('GTFS data imported successfully');
+
+    } catch (error) {
+      await client.query('ROLLBACK');
+      throw error;
+    } finally {
+      client.release();
+    }
+  }
+
+  mapRouteType(gtfsType) {
+    const typeMap = {
+      '0': 'TRAM',
+      '1': 'SUBWAY',
+      '2': 'RAIL',
+      '3': 'BUS',
+      '4': 'FERRY',
+      '100': 'RAIL',
+      '101': 'HIGH_SPEED',
+      '102': 'LONG_DISTANCE',
+      '103': 'REGIONAL',
+      '109': 'COMMUTER',
+    };
+    return typeMap[gtfsType] || 'UNKNOWN';
+  }
+
+  mapStationType(locationType) {
+    const typeMap = {
+      '0': 'STOP',
+      '1': 'STATION',
+      '2': 'ENTRANCE',
+      '3': 'GENERIC_NODE',
+      '4': 'BOARDING_AREA',
+    };
+    return typeMap[locationType] || 'STOP';
+  }
+
+  async invalidateCaches() {
+    try {
+      await redis.del('routes:*');
+      await redis.del('stations:*');
+      await redis.del('trips:*');
+      logger.info('Caches invalidated');
+    } catch (error) {
+      logger.error({ error: error.message }, 'Error invalidating caches');
+    }
+  }
+
+  async stop() {
+    logger.info('Stopping GTFS Static Syncer...');
+
+    if (this.syncInterval) {
+      clearInterval(this.syncInterval);
+      this.syncInterval = null;
+    }
+
+    await db.disconnect();
+    await redis.disconnect();
+
+    logger.info('GTFS Static Syncer stopped');
+  }
+}
+
+// Main execution
+const syncer = new GTFSStaticSyncer();
+
+const shutdown = async (signal) => {
+  logger.info({ signal }, 'Received shutdown signal');
+  await syncer.stop();
+  process.exit(0);
+};
+
+process.on('SIGTERM', () => shutdown('SIGTERM'));
+process.on('SIGINT', () => shutdown('SIGINT'));
+
+syncer.start().catch((error) => {
+  logger.fatal({ error }, 'Failed to start GTFS Static Syncer');
+  process.exit(1);
+});
+
+export default GTFSStaticSyncer;
--- a/backend/src/worker/renfe-fleet-poller.js
+++ b/backend/src/worker/renfe-fleet-poller.js
@@ -0,0 +1,474 @@
+import fetch from 'node-fetch';
+import config from '../config/index.js';
+import logger from '../lib/logger.js';
+import db from '../lib/db.js';
+import redis from '../lib/redis.js';
+
+/**
+ * Renfe Fleet Data Poller
+ * Fetches additional train data from Renfe's real-time visualization endpoint
+ * This provides extra info like delays, line codes, next stations, etc.
+ */
+class RenfeFleetPoller {
+  constructor() {
+    this.isRunning = false;
+    this.pollInterval = null;
+    this.stationsInterval = null;
+    this.linesInterval = null;
+    this.stats = {
+      totalPolls: 0,
+      successfulPolls: 0,
+      failedPolls: 0,
+      totalTrains: 0,
+      lastPollTime: null,
+      errors: [],
+    };
+
+    // Renfe real-time endpoints
+    this.FLEET_URL = 'https://tiempo-real.renfe.com/renfe-visor/flota.json';
+    this.STATIONS_URL = 'https://tiempo-real.renfe.com/data/estaciones.geojson';
+    this.LINES_URL = 'https://tiempo-real.renfe.com/data/lineasnucleos.geojson';
+  }
+
+  async start() {
+    logger.info('Starting Renfe Fleet Poller...');
+
+    // Connect to databases
+    await db.connect();
+    await redis.connect();
+
+    this.isRunning = true;
+
+    // Initial data load
+    await this.loadStationsAndLines();
+    await this.pollFleet();
+
+    // Setup polling intervals
+    // Fleet data every 30 seconds (it updates frequently)
+    this.pollInterval = setInterval(
+      () => this.pollFleet(),
+      30000
+    );
+
+    // Stations and lines every 6 hours (static data)
+    this.stationsInterval = setInterval(
+      () => this.loadStationsAndLines(),
+      6 * 60 * 60 * 1000
+    );
+
+    logger.info('Renfe Fleet Poller started');
+  }
+
+  async loadStationsAndLines() {
+    logger.info('Loading stations and lines from Renfe...');
+
+    try {
+      // Fetch stations
+      const stationsResponse = await fetch(this.STATIONS_URL, { timeout: 30000 });
+      if (stationsResponse.ok) {
+        const stationsGeoJSON = await stationsResponse.json();
+        await this.processStations(stationsGeoJSON);
+      }
+    } catch (error) {
+      logger.error({ error: error.message }, 'Error loading stations');
+    }
+
+    try {
+      // Fetch lines
+      const linesResponse = await fetch(this.LINES_URL, { timeout: 30000 });
+      if (linesResponse.ok) {
+        const linesGeoJSON = await linesResponse.json();
+        await this.processLines(linesGeoJSON);
+      }
+    } catch (error) {
+      logger.error({ error: error.message }, 'Error loading lines');
+    }
+  }
+
+  async processStations(geoJSON) {
+    if (!geoJSON.features || geoJSON.features.length === 0) {
+      logger.warn('No stations found in GeoJSON');
+      return;
+    }
+
+    const client = await db.pool.connect();
+    try {
+      await client.query('BEGIN');
+
+      let inserted = 0;
+      let updated = 0;
+
+      for (const feature of geoJSON.features) {
+        const props = feature.properties;
+        const coords = feature.geometry?.coordinates;
+
+        if (!props.CODIGO_ESTACION || !coords) continue;
+
+        // Map Renfe station to our schema
+        const stationData = {
+          station_id: `renfe_${props.CODIGO_ESTACION}`,
+          station_code: props.CODIGO_ESTACION,
+          station_name: props.NOMBRE_ESTACION || 'Unknown',
+          latitude: props.LATITUD || coords[1],
+          longitude: props.LONGITUD || coords[0],
+          station_type: this.inferStationType(props),
+          metadata: {
+            nucleo: props.NUCLEO,
+            nucleo_name: props.NOMBRE_NUCLEO,
+            lineas: props.LINEAS,
+            color: props.COLOR,
+            accesibilidad: props.ACCESIBILIDAD,
+            parking_bicis: props.PARKING_BICIS,
+            bus_urbano: props.COR_BUS?.includes('Urbano'),
+            bus_interurbano: props.COR_BUS?.includes('Interurbano'),
+            metro: props.COR_METRO,
+            source: 'renfe_visor',
+          },
+        };
+
+        const result = await client.query(`
+          INSERT INTO stations (station_id, station_code, station_name, latitude, longitude, station_type, metadata, position)
+          VALUES ($1, $2, $3, $4, $5, $6, $7, ST_SetSRID(ST_MakePoint($8, $9), 4326))
+          ON CONFLICT (station_id) DO UPDATE SET
+            station_name = EXCLUDED.station_name,
+            latitude = EXCLUDED.latitude,
+            longitude = EXCLUDED.longitude,
+            station_type = EXCLUDED.station_type,
+            metadata = stations.metadata || EXCLUDED.metadata,
+            position = EXCLUDED.position,
+            updated_at = NOW()
+          RETURNING (xmax = 0) as is_insert
+        `, [
+          stationData.station_id,
+          stationData.station_code,
+          stationData.station_name,
+          stationData.latitude,
+          stationData.longitude,
+          stationData.station_type,
+          JSON.stringify(stationData.metadata),
+          stationData.longitude,
+          stationData.latitude,
+        ]);
+
+        if (result.rows[0]?.is_insert) {
+          inserted++;
+        } else {
+          updated++;
+        }
+      }
+
+      await client.query('COMMIT');
+      logger.info({ inserted, updated, total: geoJSON.features.length }, 'Processed Renfe stations');
+
+    } catch (error) {
+      await client.query('ROLLBACK');
+      logger.error({ error: error.message }, 'Error processing stations');
+      throw error;
+    } finally {
+      client.release();
+    }
+  }
+
+  inferStationType(props) {
+    // Infer station importance based on available metadata
+    const lineas = props.LINEAS || '';
+    const lineCount = lineas.split(',').filter(Boolean).length;
+
+    if (lineCount >= 3 || props.COR_METRO) {
+      return 'MAJOR';
+    } else if (lineCount >= 2 || props.COR_BUS) {
+      return 'MEDIUM';
+    }
+    return 'MINOR';
+  }
+
+  async processLines(geoJSON) {
+    if (!geoJSON.features || geoJSON.features.length === 0) {
+      logger.warn('No lines found in GeoJSON');
+      return;
+    }
+
+    const client = await db.pool.connect();
+    try {
+      await client.query('BEGIN');
+
+      // Create lines table if not exists
+      await client.query(`
+        CREATE TABLE IF NOT EXISTS train_lines (
+          line_id VARCHAR(50) PRIMARY KEY,
+          line_code VARCHAR(20) NOT NULL,
+          line_name VARCHAR(255),
+          nucleo_id VARCHAR(20),
+          nucleo_name VARCHAR(255),
+          color VARCHAR(20),
+          geometry GEOMETRY(LineString, 4326),
+          metadata JSONB DEFAULT '{}',
+          created_at TIMESTAMP DEFAULT NOW(),
+          updated_at TIMESTAMP DEFAULT NOW()
+        )
+      `);
+
+      let processed = 0;
+
+      for (const feature of geoJSON.features) {
+        const props = feature.properties;
+        const coords = feature.geometry?.coordinates;
+
+        if (!props.CODIGO || !coords) continue;
+
+        const lineId = `${props.IDNUCLEO}_${props.CODIGO}`;
+
+        // Convert coordinates to WKT LineString
+        const coordsWKT = coords.map(c => `${c[0]} ${c[1]}`).join(',');
+
+        await client.query(`
+          INSERT INTO train_lines (line_id, line_code, line_name, nucleo_id, nucleo_name, color, geometry, metadata)
+          VALUES ($1, $2, $3, $4, $5, $6, ST_SetSRID(ST_GeomFromText('LINESTRING(' || $7 || ')'), 4326), $8)
+          ON CONFLICT (line_id) DO UPDATE SET
+            line_name = EXCLUDED.line_name,
+            color = EXCLUDED.color,
+            geometry = EXCLUDED.geometry,
+            metadata = EXCLUDED.metadata,
+            updated_at = NOW()
+        `, [
+          lineId,
+          props.CODIGO,
+          props.NOMBRE || props.CODIGO,
+          String(props.IDNUCLEO),
+          props.NUCLEO,
+          props.COLOR,
+          coordsWKT,
+          JSON.stringify({ idLinea: props.IDLINEA }),
+        ]);
+
+        processed++;
+      }
+
+      await client.query('COMMIT');
+      logger.info({ processed, total: geoJSON.features.length }, 'Processed Renfe lines');
+
+    } catch (error) {
+      await client.query('ROLLBACK');
+      logger.error({ error: error.message }, 'Error processing lines');
+    } finally {
+      client.release();
+    }
+  }
+
+  async pollFleet() {
+    if (!this.isRunning) {
+      return;
+    }
+
+    this.stats.totalPolls++;
+    const startTime = Date.now();
+
+    try {
+      logger.debug('Polling Renfe fleet data...');
+
+      const response = await fetch(this.FLEET_URL, { timeout: 15000 });
+
+      if (!response.ok) {
+        throw new Error(`HTTP ${response.status}: ${response.statusText}`);
+      }
+
+      const data = await response.json();
+
+      if (!data.trenes || !Array.isArray(data.trenes)) {
+        logger.warn('No trains found in fleet data');
+        return;
+      }
+
+      logger.info({
+        trains: data.trenes.length,
+        updateTime: data.fechaActualizacion,
+      }, 'Received Renfe fleet data');
+
+      // Process and store fleet data
+      await this.processFleetData(data.trenes, data.fechaActualizacion);
+
+      this.stats.successfulPolls++;
+      this.stats.totalTrains = data.trenes.length;
+      this.stats.lastPollTime = new Date();
+
+    } catch (error) {
+      this.stats.failedPolls++;
+      this.stats.errors.push({
+        timestamp: new Date(),
+        message: error.message,
+      });
+
+      if (this.stats.errors.length > 10) {
+        this.stats.errors = this.stats.errors.slice(-10);
+      }
+
+      logger.error({
+        error: error.message,
+        duration: Date.now() - startTime,
+      }, 'Error polling Renfe fleet');
+    }
+  }
+
+  async processFleetData(trains, updateTime) {
+    // Store fleet data in Redis for quick access
+    // This enriches the GTFS-RT data with additional info
+
+    const promises = [];
+
+    for (const train of trains) {
+      // Extract train number from tripId or codTren
+      const trainId = train.codTren;
+
+      const fleetData = {
+        tripId: train.tripId,
+        codTren: train.codTren,
+        codLinea: train.codLinea,
+        retrasoMin: parseInt(train.retrasoMin, 10) || 0,
+        codEstAct: train.codEstAct,
+        codEstSig: train.codEstSig,
+        horaLlegadaSigEst: train.horaLlegadaSigEst,
+        codEstDest: train.codEstDest,
+        codEstOrig: train.codEstOrig,
+        porAvanc: train.porAvanc, // E = en estación, C = circulando
+        latitud: train.latitud,
+        longitud: train.longitud,
+        nucleo: train.nucleo,
+        accesible: train.accesible,
+        via: train.via,
+        updatedAt: updateTime,
+      };
+
+      // Store in Redis with 5 minute expiration
+      promises.push(
+        redis.set(
+          `fleet:${trainId}`,
+          JSON.stringify(fleetData),
+          { EX: 300 }
+        )
+      );
+
+      // Also index by tripId for cross-referencing
+      if (train.tripId) {
+        promises.push(
+          redis.set(
+            `fleet:trip:${train.tripId}`,
+            trainId,
+            { EX: 300 }
+          )
+        );
+      }
+    }
+
+    // Store the full fleet list for API access
+    promises.push(
+      redis.set(
+        'fleet:all',
+        JSON.stringify(trains),
+        { EX: 60 }
+      )
+    );
+
+    promises.push(redis.set('fleet:lastUpdate', updateTime));
+
+    await Promise.all(promises);
+
+    // Save punctuality data to database for historical analysis
+    await this.savePunctualityData(trains, updateTime);
+
+    logger.debug({ count: trains.length }, 'Fleet data stored in Redis');
+  }
+
+  async savePunctualityData(trains, updateTime) {
+    if (!trains || trains.length === 0) return;
+
+    const client = await db.pool.connect();
+    try {
+      // Use batch insert for efficiency
+      const values = [];
+      const params = [];
+      let paramIndex = 1;
+
+      for (const train of trains) {
+        const delayMinutes = parseInt(train.retrasoMin, 10) || 0;
+
+        values.push(`($${paramIndex}, $${paramIndex + 1}, $${paramIndex + 2}, $${paramIndex + 3}, $${paramIndex + 4}, $${paramIndex + 5}, $${paramIndex + 6}, $${paramIndex + 7}, $${paramIndex + 8}, $${paramIndex + 9}, $${paramIndex + 10}, $${paramIndex + 11})`);
+
+        params.push(
+          train.codTren,           // train_id
+          train.tripId || null,    // trip_id
+          train.codLinea || null,  // line_code
+          train.nucleo || null,    // nucleo
+          train.codEstOrig || null, // origin_station_code
+          train.codEstDest || null, // destination_station_code
+          train.codEstAct || null,  // current_station_code
+          train.codEstSig || null,  // next_station_code
+          delayMinutes,            // delay_minutes
+          train.accesible || false, // is_accessible
+          train.via || null,        // platform
+          updateTime || new Date()  // renfe_update_time
+        );
+
+        paramIndex += 12;
+      }
+
+      const query = `
+        INSERT INTO train_punctuality (
+          train_id, trip_id, line_code, nucleo,
+          origin_station_code, destination_station_code,
+          current_station_code, next_station_code,
+          delay_minutes, is_accessible, platform, renfe_update_time
+        ) VALUES ${values.join(', ')}
+      `;
+
+      await client.query(query, params);
+      logger.debug({ count: trains.length }, 'Punctuality data saved to database');
+
+    } catch (error) {
+      logger.error({ error: error.message }, 'Error saving punctuality data');
+    } finally {
+      client.release();
+    }
+  }
+
+  async stop() {
+    logger.info('Stopping Renfe Fleet Poller...');
+
+    this.isRunning = false;
+
+    if (this.pollInterval) {
+      clearInterval(this.pollInterval);
+      this.pollInterval = null;
+    }
+
+    if (this.stationsInterval) {
+      clearInterval(this.stationsInterval);
+      this.stationsInterval = null;
+    }
+
+    await db.disconnect();
+    await redis.disconnect();
+
+    logger.info('Renfe Fleet Poller stopped');
+  }
+}
+
+// Main execution
+const poller = new RenfeFleetPoller();
+
+// Graceful shutdown
+const shutdown = async (signal) => {
+  logger.info({ signal }, 'Received shutdown signal');
+  await poller.stop();
+  process.exit(0);
+};
+
+process.on('SIGTERM', () => shutdown('SIGTERM'));
+process.on('SIGINT', () => shutdown('SIGINT'));
+
+// Start poller
+poller.start().catch((error) => {
+  logger.fatal({ error }, 'Failed to start Renfe Fleet Poller');
+  process.exit(1);
+});
+
+export default RenfeFleetPoller;
--- a/backend/src/worker/trip-updates-poller.js
+++ b/backend/src/worker/trip-updates-poller.js
@@ -0,0 +1,292 @@
+import GtfsRealtimeBindings from 'gtfs-realtime-bindings';
+import fetch from 'node-fetch';
+import config from '../config/index.js';
+import logger from '../lib/logger.js';
+import db from '../lib/db.js';
+import redis from '../lib/redis.js';
+
+class TripUpdatesPoller {
+  constructor() {
+    this.isRunning = false;
+    this.pollInterval = null;
+    this.stats = {
+      totalPolls: 0,
+      successfulPolls: 0,
+      failedPolls: 0,
+      totalUpdates: 0,
+      lastPollTime: null,
+    };
+  }
+
+  async start() {
+    logger.info('Starting Trip Updates Poller...');
+
+    await db.connect();
+    await redis.connect();
+
+    this.isRunning = true;
+
+    // Initial poll
+    await this.poll();
+
+    // Setup polling interval
+    this.pollInterval = setInterval(
+      () => this.poll(),
+      config.gtfsRT.pollingInterval
+    );
+
+    logger.info({
+      interval: config.gtfsRT.pollingInterval,
+      url: config.gtfsRT.tripUpdatesUrl,
+    }, 'Trip Updates Poller started');
+  }
+
+  async poll() {
+    if (!this.isRunning) return;
+
+    this.stats.totalPolls++;
+    const startTime = Date.now();
+
+    try {
+      logger.debug('Polling Trip Updates feed...');
+
+      const response = await fetch(config.gtfsRT.tripUpdatesUrl, {
+        timeout: 10000,
+      });
+
+      if (!response.ok) {
+        throw new Error(`HTTP ${response.status}: ${response.statusText}`);
+      }
+
+      const buffer = await response.arrayBuffer();
+      const feed = GtfsRealtimeBindings.transit_realtime.FeedMessage.decode(
+        new Uint8Array(buffer)
+      );
+
+      logger.debug({
+        entities: feed.entity?.length || 0,
+      }, 'Trip Updates feed decoded');
+
+      const updates = [];
+
+      for (const entity of feed.entity || []) {
+        if (entity.tripUpdate) {
+          const update = this.parseTripUpdate(entity);
+          if (update) {
+            updates.push(update);
+          }
+        }
+      }
+
+      logger.info({
+        updates: updates.length,
+        duration: Date.now() - startTime,
+      }, 'Processed trip updates');
+
+      if (updates.length > 0) {
+        await this.storeUpdates(updates);
+        await this.updateRedisCache(updates);
+      }
+
+      this.stats.successfulPolls++;
+      this.stats.totalUpdates = updates.length;
+      this.stats.lastPollTime = new Date();
+
+    } catch (error) {
+      this.stats.failedPolls++;
+      logger.error({
+        error: error.message,
+        stack: error.stack,
+      }, 'Error polling Trip Updates feed');
+    }
+  }
+
+  parseTripUpdate(entity) {
+    try {
+      const tu = entity.tripUpdate;
+      const trip = tu.trip;
+      const timestamp = tu.timestamp
+        ? new Date(tu.timestamp * 1000)
+        : new Date();
+
+      if (!trip?.tripId) {
+        logger.warn({ entity: entity.id }, 'Trip update missing trip_id');
+        return null;
+      }
+
+      const update = {
+        trip_id: trip.tripId,
+        route_id: trip.routeId || null,
+        start_time: trip.startTime || null,
+        start_date: trip.startDate || null,
+        schedule_relationship: this.mapScheduleRelationship(trip.scheduleRelationship),
+        delay_seconds: tu.delay || null,
+        timestamp: timestamp,
+        recorded_at: new Date(),
+        stop_time_updates: [],
+      };
+
+      // Parse stop time updates
+      for (const stu of tu.stopTimeUpdate || []) {
+        const stopUpdate = {
+          stop_sequence: stu.stopSequence,
+          stop_id: stu.stopId,
+          arrival_delay: stu.arrival?.delay || null,
+          arrival_time: stu.arrival?.time
+            ? new Date(stu.arrival.time * 1000)
+            : null,
+          departure_delay: stu.departure?.delay || null,
+          departure_time: stu.departure?.time
+            ? new Date(stu.departure.time * 1000)
+            : null,
+          schedule_relationship: this.mapScheduleRelationship(
+            stu.scheduleRelationship
+          ),
+        };
+
+        update.stop_time_updates.push(stopUpdate);
+      }
+
+      return update;
+    } catch (error) {
+      logger.error({
+        error: error.message,
+        entity: entity.id,
+      }, 'Error parsing trip update');
+      return null;
+    }
+  }
+
+  mapScheduleRelationship(relationship) {
+    const map = {
+      0: 'SCHEDULED',
+      1: 'ADDED',
+      2: 'UNSCHEDULED',
+      3: 'CANCELED',
+    };
+    return map[relationship] || 'SCHEDULED';
+  }
+
+  async storeUpdates(updates) {
+    const client = await db.pool.connect();
+
+    try {
+      await client.query('BEGIN');
+
+      for (const update of updates) {
+        // Insert trip update
+        const result = await client.query(`
+          INSERT INTO trip_updates (
+            trip_id, route_id, start_time, start_date,
+            schedule_relationship, delay_seconds, timestamp, recorded_at
+          )
+          VALUES ($1, $2, $3, $4, $5, $6, $7, $8)
+          RETURNING id
+        `, [
+          update.trip_id,
+          update.route_id,
+          update.start_time,
+          update.start_date,
+          update.schedule_relationship,
+          update.delay_seconds,
+          update.timestamp,
+          update.recorded_at,
+        ]);
+
+        const tripUpdateId = result.rows[0].id;
+
+        // Insert stop time updates
+        for (const stu of update.stop_time_updates) {
+          await client.query(`
+            INSERT INTO stop_time_updates (
+              trip_update_id, stop_sequence, stop_id,
+              arrival_delay, arrival_time, departure_delay,
+              departure_time, schedule_relationship
+            )
+            VALUES ($1, $2, $3, $4, $5, $6, $7, $8)
+          `, [
+            tripUpdateId,
+            stu.stop_sequence,
+            stu.stop_id,
+            stu.arrival_delay,
+            stu.arrival_time,
+            stu.departure_delay,
+            stu.departure_time,
+            stu.schedule_relationship,
+          ]);
+        }
+      }
+
+      await client.query('COMMIT');
+
+      logger.debug({ count: updates.length }, 'Trip updates stored');
+
+    } catch (error) {
+      await client.query('ROLLBACK');
+      logger.error({ error: error.message }, 'Error storing trip updates');
+      throw error;
+    } finally {
+      client.release();
+    }
+  }
+
+  async updateRedisCache(updates) {
+    try {
+      // Store delays in Redis for quick access
+      for (const update of updates) {
+        const key = `trip_update:${update.trip_id}`;
+        await redis.set(key, JSON.stringify(update), { EX: 300 }); // 5 min TTL
+
+        // If delayed or canceled, add to delayed set
+        if (update.delay_seconds > 0 || update.schedule_relationship === 'CANCELED') {
+          await redis.sAdd('trips:delayed', update.trip_id);
+        }
+
+        // If canceled, add to canceled set
+        if (update.schedule_relationship === 'CANCELED') {
+          await redis.sAdd('trips:canceled', update.trip_id);
+        }
+      }
+
+      logger.debug({ count: updates.length }, 'Redis cache updated');
+
+    } catch (error) {
+      logger.error({ error: error.message }, 'Error updating Redis cache');
+    }
+  }
+
+  async stop() {
+    logger.info('Stopping Trip Updates Poller...');
+
+    this.isRunning = false;
+
+    if (this.pollInterval) {
+      clearInterval(this.pollInterval);
+      this.pollInterval = null;
+    }
+
+    await db.disconnect();
+    await redis.disconnect();
+
+    logger.info('Trip Updates Poller stopped');
+  }
+}
+
+// Main execution
+const poller = new TripUpdatesPoller();
+
+const shutdown = async (signal) => {
+  logger.info({ signal }, 'Received shutdown signal');
+  await poller.stop();
+  process.exit(0);
+};
+
+process.on('SIGTERM', () => shutdown('SIGTERM'));
+process.on('SIGINT', () => shutdown('SIGINT'));
+
+poller.start().catch((error) => {
+  logger.fatal({ error }, 'Failed to start Trip Updates Poller');
+  process.exit(1);
+});
+
+export default TripUpdatesPoller;