{
  "contentStorage": "postgres",
  "title": "Paris Metro Line 4",
  "description": "Paris Metro Line 4 is a north-south trunk line, starting from Porte de Clignancourt in the north to Bagneux–Lucie Aubrac in the south, and has achieved fully automated operation.",
  "url": "/en/concepts/paris-metro-line-4.html",
  "entity": {
    "customFields": [
      {
        "key": "line_opened",
        "value": "April 21, 1908"
      },
      {
        "key": "line_length",
        "value": "Approximately 14 kilometers"
      },
      {
        "key": "line_termini",
        "value": "Porte de Clignancourt ↔ Bagneux–Lucie Aubrac"
      },
      {
        "key": "line_structure",
        "value": "Underground (outdoor crossing over the Seine between Cité and Saint-Michel)"
      },
      {
        "key": "line_max_speed",
        "value": "70 km/h"
      },
      {
        "key": "line_status",
        "value": "In operation"
      },
      {
        "key": "line_operator",
        "value": "RATP"
      },
      {
        "key": "line_owner",
        "value": "RATP"
      },
      {
        "key": "line_rolling_stock",
        "value": "MP14"
      },
      {
        "key": "line_stations",
        "value": "29"
      }
    ],
    "id": "concept_paris_metro_l4",
    "type": "concept",
    "title": "Paris Metro Line 4",
    "slug": "paris-metro-line-4",
    "summary": "Paris Metro Line 4 is a north-south trunk line, starting from Porte de Clignancourt in the north to Bagneux–Lucie Aubrac in the south, and has achieved fully automated operation.",
    "status": "published",
    "categories": [
      "category-transit",
      "category-urban-rail"
    ],
    "tags": [
      "tag-metro",
      "tag-metro-line"
    ],
    "sources": [
      {
        "id": "wiki_ligne_4_du_m_c3_a9tro_de_paris",
        "title": "Ligne 4 du métro de Paris — Wikipédia",
        "url": "https://fr.wikipedia.org/wiki/Ligne_4_du_m%C3%A9tro_de_Paris"
      },
      {
        "id": "ratp",
        "title": "RATP Group — RATP en Île-de-France",
        "url": "https://ratpgroup.com/the-ratp-group/entities/ratp"
      }
    ],
    "createdAt": "2026-10-28T00:00:00+08:00",
    "updatedAt": "2026-10-31T13:11:34+08:00",
    "updatedBy": "user:admin",
    "revision": 21,
    "body": "## Overview\n\nLine 4 is the first north-south line of the Paris Metro, opened in 1908 between Châtelet and Porte de Clignancourt. It runs through the core of Paris and crosses the Seine River above ground between Cité and Saint-Michel [^wiki].\n\n## History\n\n- 1908: Châtelet–Porte de Clignancourt section opened; 1909: extended south to Porte d'Orléans;\n- 2013: extended to Mairie de Montrouge; 2022: extended to Bagneux–Lucie Aubrac;\n- Early 2020s: fully automated, using MP14 trains [^wiki].\n\n## Major Stations\n\nPorte de Clignancourt, [[place_paris_gare_du_nord|Paris North Station]], [[place_paris_gare_de_l_est|Paris East Station]], Strasbourg–Saint-Denis, Châtelet, Saint-Michel, Odéon, Saint-Germain-des-Prés, [[place_paris_gare_montparnasse|Paris Montparnasse Station]], Denfert-Rochereau, Porte d'Orléans, Mairie de Montrouge, Bagneux–Lucie Aubrac.\n\n## Operation\n\n- Operator: RATP [^ratp]\n- Rolling Stock: MP14 (rubber-tired), fully automated\n- Service Hours: approximately 5:30 AM–1:15 AM the next day",
    "url": "/concepts/paris-metro-line-4.html",
    "lang": "en",
    "sourceLang": "zh",
    "availableLangs": [
      "zh",
      "de",
      "en",
      "fr",
      "ja",
      "ko"
    ],
    "conceptKind": "metro_line"
  },
  "entities": null,
  "tags": [
    {
      "id": "tag-metro",
      "slug": "metro",
      "name": "Metro",
      "description": "Metro lines, stations and operating companies in Chinese cities.",
      "names": {
        "ar": "مترو",
        "de": "U-Bahn",
        "en": "Metro",
        "es": "Metro",
        "fr": "Métro",
        "hi": "मेट्रो",
        "id": "Metro",
        "it": "Metropolitana",
        "ja": "地下鉄",
        "ko": "지하철",
        "ms": "Metro",
        "nl": "Metro",
        "pt": "Metro",
        "ru": "Метро",
        "th": "รถไฟฟ้าใต้ดิน",
        "tr": "Metro",
        "vi": "Tàu điện ngầm",
        "zh": "地铁",
        "zh-hant": "地鐵"
      },
      "descriptions": {
        "ar": "خطوط المترو ومحطاته والمشغلون في المدن الصينية.",
        "de": "U-Bahn-Linien, Stationen und Betreiber in chinesischen Städten.",
        "en": "Metro lines, stations and operating companies in Chinese cities.",
        "es": "Líneas, estaciones y operadores de metro de ciudades chinas.",
        "fr": "Lignes, stations et opérateurs de métro des villes chinoises.",
        "hi": "चीनी शहरों की मेट्रो लाइनें, स्टेशन और संचालक संस्थाएँ।",
        "id": "Jalur, stasiun, dan operator metro di kota-kota Tiongkok.",
        "it": "Linee, stazioni e gestori della metropolitana nelle città cinesi.",
        "ja": "中国各都市の地下鉄路線・駅・運営事業者。",
        "ko": "중국 도시의 지하철 노선·역·운영 기관.",
        "ms": "Laluan, stesen dan pengendali metro di bandar-bandar China.",
        "nl": "Metrolijnen, stations en vervoerders in Chinese steden.",
        "pt": "Linhas, estações e operadores de metro das cidades chinesas.",
        "ru": "Линии, станции и операторы метро в городах Китая.",
        "th": "เส้นทาง สถานี และผู้ให้บริการรถไฟฟ้าใต้ดินในเมืองจีน",
        "tr": "Çin şehirlerindeki metro hatları, istasyonları ve işletmecileri.",
        "vi": "Tuyến, ga và đơn vị vận hành tàu điện ngầm ở các thành phố Trung Quốc.",
        "zh": "中国城市地铁线路、车站与运营机构。",
        "zh-hant": "中國城市地鐵路線、車站與營運機構。"
      },
      "count": 6975
    },
    {
      "id": "tag-metro-line",
      "slug": "metro-line",
      "name": "Metro line",
      "description": "Operating lines of urban metro and light rail systems.",
      "names": {
        "ar": "خط مترو",
        "de": "U-Bahn-Linie",
        "en": "Metro line",
        "es": "Línea de metro",
        "fr": "Ligne de métro",
        "hi": "मेट्रो लाइन",
        "id": "Jalur metro",
        "it": "Linea della metropolitana",
        "ja": "地下鉄路線",
        "ko": "지하철 노선",
        "ms": "Laluan metro",
        "nl": "Metrolijn",
        "pt": "Linha de metrô",
        "ru": "Линия метро",
        "th": "สายรถไฟฟ้าใต้ดิน",
        "tr": "Metro hattı",
        "vi": "Tuyến tàu điện ngầm",
        "zh": "地铁线路",
        "zh-hant": "地鐵路線"
      },
      "descriptions": {
        "ar": "الخطوط العاملة لأنظمة المترو والسكك الحديدية الخفيفة في المدن.",
        "de": "Betriebene Linien von U-Bahn- und Stadtbahnsystemen.",
        "en": "Operating lines of urban metro and light rail systems.",
        "es": "Líneas en servicio de metro y tren ligero urbano.",
        "fr": "Lignes exploitées de métro et de métro léger urbain.",
        "hi": "शहरी मेट्रो और लाइट रेल प्रणालियों की चालू लाइनें।",
        "id": "Jalur operasional sistem metro dan kereta ringan perkotaan.",
        "it": "Linee in esercizio di metropolitane e metropolitane leggere urbane.",
        "ja": "都市の地下鉄・ライトレールの運行路線。",
        "ko": "도시 지하철 및 경전철 운행 노선.",
        "ms": "Laluan operasi sistem metro dan rel ringan bandar.",
        "nl": "Lijnen in bedrijf van metro- en lightrailsystemen in steden.",
        "pt": "Linhas em operação de metrô e de veículo leve sobre trilhos.",
        "ru": "Действующие линии метрополитена и лёгкого метро.",
        "th": "เส้นทางเดินรถของระบบรถไฟฟ้าใต้ดินและรถไฟฟ้ารางเบาในเมือง",
        "tr": "Kentsel metro ve hafif raylı sistemlerin işletilen hatları.",
        "vi": "Các tuyến đang khai thác của hệ thống tàu điện ngầm và đường sắt nhẹ đô thị.",
        "zh": "城市地铁与轻轨的运营线路。",
        "zh-hant": "城市地鐵與輕軌的營運路線。"
      },
      "count": 459
    }
  ],
  "mentions": [
    {
      "fromId": "concept_paris_metro",
      "fromTitle": "Paris Metro",
      "fromUrl": "/en/concepts/paris-metro.html",
      "fromType": "concept"
    },
    {
      "fromId": "place_paris_gare_de_l_est",
      "fromTitle": "Paris East Station (Gare de l'Est)",
      "fromUrl": "/en/places/paris-gare-de-l-est.html",
      "fromType": "place"
    },
    {
      "fromId": "place_paris_gare_du_nord",
      "fromTitle": "Paris North Station (Gare du Nord)",
      "fromUrl": "/en/places/paris-gare-du-nord.html",
      "fromType": "place"
    },
    {
      "fromId": "place_paris_gare_montparnasse",
      "fromTitle": "Paris Montparnasse Station (Gare Montparnasse)",
      "fromUrl": "/en/places/paris-gare-montparnasse.html",
      "fromType": "place"
    }
  ],
  "versions": [
    {
      "revision": 21,
      "updatedAt": "2026-10-31T13:11:34+08:00",
      "message": "当前版本",
      "hasSnapshot": true,
      "url": "/en/concepts/paris-metro-line-4/at/21.html"
    }
  ],
  "lang": "en",
  "availableLangs": [
    "zh",
    "de",
    "en",
    "fr",
    "ja",
    "ko"
  ],
  "infoFields": [
    {
      "key": "concept_kind",
      "label": "Concept kind",
      "value": "Metro line"
    },
    {
      "key": "line_opened",
      "label": "Opened",
      "value": "April 21, 1908"
    },
    {
      "key": "line_length",
      "label": "Length",
      "value": "Approximately 14 kilometers"
    },
    {
      "key": "line_stations",
      "label": "Stations",
      "value": "29"
    },
    {
      "key": "line_termini",
      "label": "Termini",
      "value": "Porte de Clignancourt ↔ Bagneux–Lucie Aubrac"
    },
    {
      "key": "line_structure",
      "label": "Structure",
      "value": "Underground (outdoor crossing over the Seine between Cité and Saint-Michel)"
    },
    {
      "key": "line_max_speed",
      "label": "Maximum speed",
      "value": "70 km/h"
    },
    {
      "key": "line_status",
      "label": "Status",
      "value": "In operation"
    },
    {
      "key": "line_operator",
      "label": "Operator",
      "value": "RATP"
    },
    {
      "key": "line_owner",
      "label": "Owner",
      "value": "RATP"
    },
    {
      "key": "line_rolling_stock",
      "label": "Rolling stock",
      "value": "MP14"
    }
  ],
  "mentionsTotal": 4
}