{
  "dataset": "Baltic rail and ferry connection corridors",
  "checkedOn": "2026-09-29",
  "reviewIntervalDays": 30,
  "maintainer": "Baltics Worldwide editorial",
  "scope": "A small, manually checked corridor reference. It is not a timetable or a complete transport network.",
  "limitations": [
    "No departure or arrival times, journey durations, fares, seat availability, operating frequency, or service guarantees are stored.",
    "Use the official operator lookup for the direction and date you plan to travel; works, cancellations, and timetables change.",
    "A route not found in this small graph is unknown here, not proof that no transport service exists.",
    "Coach, car, and ferry routes other than Tallinn–Helsinki are outside this checked dataset."
  ],
  "sources": [
    {
      "id": "elron-corridor",
      "publisher": "Elron",
      "title": "Tallinn–Tartu–Riga–Vilnius train connection",
      "url": "https://elron.ee/en/Tallinn-Tartu-Riga-Vilnius-train-connection",
      "checkedOn": "2026-09-29",
      "supports": "Elron identifies Tallinn–Tartu–Valga as its section; the Valga–Riga section as operated by Vivi; and Riga–Vilnius as operated by LTG Link. The page warns that works change departure and arrival times.",
      "limits": "The page contained September/October 2026 timetable changes. No times, frequency, fares, or ticket horizon from it are embedded in this dataset."
    },
    {
      "id": "vivi-lookup",
      "publisher": "Vivi (AS Pasažieru vilciens)",
      "title": "Vivi passenger rail and schedule lookup",
      "url": "https://www.vivi.lv/en/",
      "checkedOn": "2026-09-29",
      "supports": "Vivi provides a route/date journey search and posts operational schedule changes.",
      "limits": "Search results are date-specific and are not copied into this static reference."
    },
    {
      "id": "ltg-link-lookup",
      "publisher": "LTG Link",
      "title": "Vilnius–Riga route lookup",
      "url": "https://ltglink.lt/en/vilnius-riga-en",
      "checkedOn": "2026-09-29",
      "supports": "The URL is linked by Elron as the LTG Link route/ticket source for Riga–Vilnius.",
      "limits": "The page returned HTTP 403 to this research fetch, so no additional claim is based on a direct read of it."
    },
    {
      "id": "tallink-timetables",
      "publisher": "Tallink Silja Line",
      "title": "Timetables for Tallink Silja Line ships",
      "url": "https://www.tallink.com/timetables",
      "checkedOn": "2026-09-29",
      "supports": "The page lists Tallinn and Helsinki and asks travellers to search by route and travel date; its route map describes ferry routes between Finland and Estonia.",
      "limits": "The timetable page says maintenance, cancellations, and special cruises may affect departures. No schedule or frequency is embedded here."
    }
  ],
  "places": [
    { "id": "helsinki", "name": "Helsinki", "country": "Finland", "plannerCity": false, "sourceIds": ["tallink-timetables"] },
    { "id": "tallinn", "name": "Tallinn", "country": "Estonia", "plannerCity": true, "sourceIds": ["elron-corridor", "tallink-timetables"] },
    { "id": "riga", "name": "Riga", "country": "Latvia", "plannerCity": true, "sourceIds": ["elron-corridor", "vivi-lookup"] },
    { "id": "vilnius", "name": "Vilnius", "country": "Lithuania", "plannerCity": true, "sourceIds": ["elron-corridor", "ltg-link-lookup"] }
  ],
  "connections": [
    {
      "id": "helsinki-tallinn-ferry",
      "from": "helsinki",
      "to": "tallinn",
      "mode": "ferry",
      "name": "Helsinki–Tallinn ferry corridor",
      "summary": "Tallink's date-based timetable lists Helsinki and Tallinn. Check the operator for the direction and date you need.",
      "changes": [],
      "operators": [{ "name": "Tallink Silja Line", "url": "https://www.tallink.com/timetables" }],
      "sourceIds": ["tallink-timetables"]
    },
    {
      "id": "tallinn-riga-rail",
      "from": "tallinn",
      "to": "riga",
      "mode": "rail",
      "name": "Tallinn–Riga rail corridor",
      "summary": "Elron's Tallinn–Tartu–Valga section connects with Vivi's Valga–Riga section. The operator handoff is at Valga.",
      "via": ["Tartu", "Valga"],
      "changes": [{ "at": "Valga", "from": "Elron", "to": "Vivi" }],
      "operators": [
        { "name": "Elron", "url": "https://elron.ee/en/soiduinfo/soiduplaanid" },
        { "name": "Vivi", "url": "https://www.vivi.lv/en/" }
      ],
      "sourceIds": ["elron-corridor", "vivi-lookup"]
    },
    {
      "id": "riga-vilnius-rail",
      "from": "riga",
      "to": "vilnius",
      "mode": "rail",
      "name": "Riga–Vilnius rail corridor",
      "summary": "Elron identifies the Riga–Vilnius section as operated by LTG Link. Check the current date-specific service with LTG Link.",
      "via": ["Jelgava", "Joniškis", "Šiauliai", "Radviliškis", "Kėdainiai", "Jonava", "Kaišiadorys"],
      "changes": [],
      "operators": [{ "name": "LTG Link", "url": "https://ltglink.lt/en/vilnius-riga-en" }],
      "sourceIds": ["elron-corridor", "ltg-link-lookup"]
    }
  ]
}