{
  "contentStorage": "postgres",
  "title": "U4 (Berlin U-Bahn)",
  "description": "With 2.9 km and five stations, the U4 is the shortest line of the Berlin U-Bahn; it was opened on 1 December 1910 as Germany's first municipal U-Bahn and connects Nollendorfplatz with Innsbrucker Platz in Schöneberg.",
  "url": "/en/concepts/ubahn-berlin-u4/at/26.html",
  "entity": {
    "customFields": [
      {
        "key": "line_depots",
        "value": "Betriebshof Grunewald (bis 1932 eigene Werkstatt an der Otzenstraße in Schöneberg)"
      },
      {
        "key": "line_headway",
        "value": "HVZ 5 Minuten, NVZ 10 Minuten, schwach nachgefragte Zeiten 15 Minuten"
      },
      {
        "key": "line_hours",
        "value": "werktags ca. 4:30 bis 1:00 Uhr; als einzige Berliner U-Bahn-Linie ohne durchgehenden Nachtverkehr an Wochenenden"
      },
      {
        "key": "line_last_extension",
        "value": "keine – die Linie wurde seit ihrer Eröffnung am 1. Dezember 1910 nie verlängert"
      },
      {
        "key": "line_length",
        "value": "2,9 km"
      },
      {
        "key": "line_max_speed",
        "value": "72 km/h (Höchstgeschwindigkeit des Berliner U-Bahn-Netzes)"
      },
      {
        "key": "line_opened",
        "value": "1 December 1910"
      },
      {
        "key": "line_operator",
        "value": "BVG – Berliner Verkehrsbetriebe"
      },
      {
        "key": "line_owner",
        "value": "errichtet und ursprünglich im Eigentum der Stadt Schöneberg; heute Berliner Verkehrsbetriebe (BVG), Anstalt des öffentlichen Rechts"
      },
      {
        "key": "line_rolling_stock",
        "value": "Baureihe A3 (A3L), kürzeste Züge des Netzes"
      },
      {
        "key": "line_stations",
        "value": "5"
      },
      {
        "key": "line_status",
        "value": "In Betrieb"
      },
      {
        "key": "line_structure",
        "value": "durchgehend Tunnelstrecke (Untergrundbahn)"
      },
      {
        "key": "line_termini",
        "value": "Nollendorfplatz – Innsbrucker Platz"
      }
    ],
    "id": "concept_ubahn_berlin_u4",
    "type": "concept",
    "title": "U4 (Berlin U-Bahn)",
    "slug": "ubahn-berlin-u4",
    "summary": "With 2.9 km and five stations, the U4 is the shortest line of the Berlin U-Bahn; it was opened on 1 December 1910 as Germany's first municipal U-Bahn and connects Nollendorfplatz with Innsbrucker Platz in Schöneberg.",
    "status": "published",
    "categories": [
      "category-transit",
      "category-urban-rail"
    ],
    "tags": [
      "tag-metro",
      "tag-metro-line"
    ],
    "sources": [
      {
        "id": "wikipedia",
        "title": "U-Bahn-Linie U4 (Berlin) — Wikipedia",
        "url": "https://de.wikipedia.org/wiki/U-Bahn-Linie_U4_(Berlin)",
        "locator": "Abschnitte Verlauf und Stationen; abgerufen 2026-10-28"
      },
      {
        "id": "bvg",
        "title": "U-Bahn-Linie U4: Fahrplan, Haltestellen — BVG",
        "url": "https://www.bvg.de/de/verbindungen/linienuebersicht/u4",
        "locator": "Haltestellenliste; abgerufen 2026-10-28"
      }
    ],
    "createdAt": "2026-10-28T00:00:00+08:00",
    "updatedAt": "2026-10-29T17:35:39+08:00",
    "updatedBy": "user:admin",
    "revision": 26,
    "body": "## Overview\n\nThe U-Bahn line U4 is the shortest line of the Berlin U-Bahn network: it has five stations and a length of 2.9 km. It was opened on 1 December 1910 by the then independent city of Schöneberg as Germany's first municipal U-Bahn (client: Schöneberg; construction: Siemens \u0026 Halske/AEG) and is the only Berlin U-Bahn line that was never extended. It has borne the designation U4 since 28 February 1966.\n\n## Operator\n\nOperated by [[organization_bvg|Berlin Transport Company (BVG)]].\n\n## History\n\nThe Schöneberg U-Bahn was built by the city of Schöneberg, which was independent until 1920, and was the first municipally built U-Bahn in Germany; after construction began on 8 December 1908, the line was opened on 1 December 1910 between Nollendorfplatz and Innsbrucker Platz (then Hauptstraße). Operation was transferred to the Berliner Hochbahngesellschaft; only in 1926, with the reconstruction of Nollendorfplatz, was a track connection to the Berlin Kleinprofil network created. The line was never extended and thus retained its original length of around 2.9 kilometres.\n\n## Stations\n\nStations in operating direction from north to south (Nollendorfplatz – Innsbrucker Platz):\n\n- Nollendorfplatz\n- Viktoria-Luise-Platz\n- Bayerischer Platz\n- Rathaus Schöneberg\n- Innsbrucker Platz\n\n## Special features\n\nWith a length of 2.9 kilometres and five stations, the U4 is the shortest Berlin U-Bahn line; it has never been extended since its opening and is also the only line without continuous night service on weekends. At its opening in 1910 it was the pride of the then city of Schöneberg; the excavated soil from the tunnel was used to fill the Rudolph-Wilde-Park. Until 1932 the line had its own workshop on Otzenstraße; thereafter the vehicles were maintained using the facilities of the Berlin U-Bahn network (including the Grunewald depot). Nollendorfplatz station is a central junction: all four Kleinprofil lines (U1–U4) meet here; the U4 initially received its own underground station on Motzstraße in 1910, before the joint reconstruction into a four-station junction was created in 1926. An extension today is blocked by the tunnel of the Stadtring (A 100) crossing beneath Innsbrucker Platz as well as by the preliminary construction works for the never-realised U10, so southern extension plans are considered unfeasible. All five stations are barrier-free; on the occasion of the centenary, a museum train of class A1 ran on the line in November 2010.",
    "url": "/concepts/ubahn-berlin-u4.html",
    "lang": "en",
    "sourceLang": "zh",
    "availableLangs": [
      "zh",
      "ar",
      "en",
      "es",
      "fr",
      "hi",
      "id",
      "it",
      "ja",
      "ko",
      "ms",
      "nl",
      "pt",
      "ru",
      "th",
      "tr",
      "vi",
      "zh-hant"
    ],
    "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
    }
  ],
  "versions": [
    {
      "revision": 26,
      "updatedAt": "2026-10-31T12:41:13+08:00",
      "message": "当前版本",
      "hasSnapshot": true,
      "url": "/en/concepts/ubahn-berlin-u4/at/26.html"
    }
  ],
  "viewRevision": 26,
  "lang": "en",
  "availableLangs": [
    "zh",
    "ar",
    "en",
    "es",
    "fr",
    "hi",
    "id",
    "it",
    "ja",
    "ko",
    "ms",
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    "th",
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  ],
  "infoFields": [
    {
      "key": "concept_kind",
      "label": "Concept kind",
      "value": "Metro line"
    },
    {
      "key": "line_opened",
      "label": "Opened",
      "value": "1 December 1910"
    },
    {
      "key": "line_last_extension",
      "label": "Last extension",
      "value": "keine – die Linie wurde seit ihrer Eröffnung am 1. Dezember 1910 nie verlängert"
    },
    {
      "key": "line_length",
      "label": "Length",
      "value": "2,9 km"
    },
    {
      "key": "line_stations",
      "label": "Stations",
      "value": "5"
    },
    {
      "key": "line_termini",
      "label": "Termini",
      "value": "Nollendorfplatz – Innsbrucker Platz"
    },
    {
      "key": "line_structure",
      "label": "Structure",
      "value": "durchgehend Tunnelstrecke (Untergrundbahn)"
    },
    {
      "key": "line_max_speed",
      "label": "Maximum speed",
      "value": "72 km/h (Höchstgeschwindigkeit des Berliner U-Bahn-Netzes)"
    },
    {
      "key": "line_status",
      "label": "Status",
      "value": "In Betrieb"
    },
    {
      "key": "line_operator",
      "label": "Operator",
      "value": "BVG – Berliner Verkehrsbetriebe"
    },
    {
      "key": "line_owner",
      "label": "Owner",
      "value": "errichtet und ursprünglich im Eigentum der Stadt Schöneberg; heute Berliner Verkehrsbetriebe (BVG), Anstalt des öffentlichen Rechts"
    },
    {
      "key": "line_depots",
      "label": "Depots",
      "value": "Betriebshof Grunewald (bis 1932 eigene Werkstatt an der Otzenstraße in Schöneberg)"
    },
    {
      "key": "line_rolling_stock",
      "label": "Rolling stock",
      "value": "Baureihe A3 (A3L), kürzeste Züge des Netzes"
    },
    {
      "key": "line_hours",
      "label": "Operating hours",
      "value": "werktags ca. 4:30 bis 1:00 Uhr; als einzige Berliner U-Bahn-Linie ohne durchgehenden Nachtverkehr an Wochenenden"
    },
    {
      "key": "line_headway",
      "label": "Headway",
      "value": "HVZ 5 Minuten, NVZ 10 Minuten, schwach nachgefragte Zeiten 15 Minuten"
    }
  ]
}