HSL provides GTFS-RT feeds for service alerts, trip updates and vehicle positions that complement the static GTFS data. The feeds are using version 2.0 of GTFS-RT specification. See Google's documentation for more details.
Note that if you are not using the static GTFS package, you most likely want to use Digitransit APIs which provide the same data in a more ready-to-use format.
- Service alerts:
- Trip updates:
- Vehicle positions: