openapi: 3.1.0
info:
  title: Transit API (Stable) Map Layers Vehicles API
  version: 4.0.0
  x-logo:
    url: transit-logotype_iOS-dark.png
  contact: {}
  description: '**📌 You are viewing v4 (Stable). View the legacy [v3 API here](v3.html).**


    API provided by data from [transit.app](https://transit.app). Request an API key [here](https://https://transitapp.com/partners/apis).

    '
servers:
- url: https://external.transitapp.com
  description: ''
  variables: {}
  x-last-modified: 1614306184264
security:
- apiKey: []
tags:
- name: Vehicles
paths:
  /v4/vehicles:
    get:
      operationId: /v4/vehicles
      description: Returns real-time vehicle positions for a given route
      parameters:
      - in: query
        name: global_route_id
        required: true
        description: Global route ID to get vehicles for
        schema:
          type: string
          example: STM:884
      - in: query
        name: direction_id
        required: false
        description: Optional direction ID to filter vehicles by direction
        schema:
          type: integer
          enum:
          - 0
          - 1
          example: 0
      responses:
        '200':
          description: List of vehicles for the route
          content:
            application/json:
              schema:
                type: object
                properties:
                  vehicles:
                    type: array
                    items:
                      type: object
                      properties:
                        vehicle_id:
                          type: string
                          description: Unique internal identifier for the vehicle, combining feed_code, global route id, and internal vehicle id
                          example: STM:980:1|29088
                        latitude:
                          type: number
                          format: float
                          description: Latitude of the vehicle
                          example: 45.51379
                        longitude:
                          type: number
                          format: float
                          description: Longitude of the vehicle
                          example: -73.683243
                        direction_id:
                          type: integer
                          enum:
                          - 0
                          - 1
                          description: Direction of travel for this vehicle. 0 = Outbound, 1 = Inbound
                          example: 0
                        updated_at:
                          type: integer
                          description: Unix timestamp of when the vehicle position was last updated
                          example: 1764097776
                        vehicle_label:
                          type: string
                          nullable: true
                          description: Vehicle identifier as provided by the operator. May be null.
                          example: 29-088
                        occupancy_status:
                          type: integer
                          nullable: true
                          enum:
                          - 1
                          - 2
                          - 3
                          description: Occupancy status of the vehicle. May be null if unavailable. 1 = Not crowded, 2 = Some crowding, 3 = Crowded
                          example: 1
                        wheelchair_accessible:
                          type: integer
                          nullable: true
                          enum:
                          - 0
                          - 1
                          - 2
                          description: 'Whether the vehicle is accessible. May be null if unavailable. Note: this only reflects real-time data for the specific vehicle. Routes with unknown values may be accessible if defined in static data. 0 = Unknown, 1 = Available (accessible), 2 = NotAvailable (inaccessible)'
                          example: 1
                        external_vehicle_id:
                          type: string
                          nullable: true
                          description: External vehicle identifier from the transit operator. May be null.
                          example: '29088'
                        rt_trip_id:
                          type: string
                          nullable: true
                          description: Real-time trip identifier. May be null. If multiple trip IDs are assigned, returns the first one.
                          example: '292679910'
                      required:
                      - vehicle_id
                      - latitude
                      - longitude
                      - direction_id
                      - updated_at
                required:
                - vehicles
              examples:
                Example 1:
                  value:
                    vehicles:
                    - vehicle_id: STM:980:1|29088
                      latitude: 45.51379
                      longitude: -73.683243
                      direction_id: 0
                      updated_at: 1764097776
                      vehicle_label: 29-088
                      occupancy_status: 1
                      wheelchair_accessible: 1
                      external_vehicle_id: '29088'
                      rt_trip_id: '292679910'
        '400':
          description: Missing or invalid global_route_id parameter
      tags:
      - Vehicles
components:
  securitySchemes:
    apiKey:
      name: apiKey
      type: apiKey
      in: header