This page provides a list of realtime transit terms and definitions to help transit partners and data aggregators use the terms consistently across multiple documents or user interfaces.
|A separate section of a train that carries passengers.
|A distinguishable object that represents a real-world existence, such as a vehicle, trip, or stop. Entities are identifiable with a unique ID, and each entity type has a set of fields that describe it.
|A record that provides metadata about a feed, such as its version and timestamp.
|A record that contains data about a particular entity. Messages are included in feed messages, and they provide information about the entities in the feed.
|A file that complies with the GTFS-realtime format and provides current information about the transit service. The file's contents cover trip updates, service alerts, or vehicle positions
|Alerts that provide passengers with updates when there’s a disruption on the transit network.
|Updates about the delays or cancellations of individual trips.
|Information about the current location of a particular vehicle.