Hello all,
As of today, the Mattapan Line (the trolley line that runs between Ashmont and Mattapan Stations) has real-time data in our API and in GTFS-realtime. We have worked with the Vehicle Maintenance department to install GPS in the Mattapan trolleys, and will be producing locations and predictions data in our API.
You can take a look using queries such as these:
Like the Green Line there are no predictions yet before a train leaves the beginning of the route at Mattapan. But there are predictions from Ashmont, and unlike the Green Line the predictions do use GTFS trip_id’s.
Please let us know if you have any questions about this data.
Sincerely,
developer@MBTA