Greater Portland Metro Bus

What changed since the last check

• Correctness no change
• Freshness no change
• Rider experience no change
• Realtime quality no change

Top three things to fix

1. Check the trip updates endpoint with your AVL vendor; it should return a fresh GTFS-Realtime protobuf on every request.

   The trip updates realtime feed failed during sampling. When this feed is down, riders see scheduled times presented as if they were live.

   Effort: Usually a vendor support ticket.

   Agencies here usually clear this within about 1 week (based on 11 observed fixes).

2. Set wheelchair_boarding to 1 (accessible) or 2 (not accessible) for every stop. A field survey can start with the busiest stops.

   1314 of 1314 stops don't say whether a wheelchair user can board there. Riders who use wheelchairs can't plan a trip when accessibility is marked 'unknown'; apps show no information at all.

   Effort: A column in stops.txt; your scheduling software likely has it.

3. Set wheelchair_accessible on every trip (most small-agency fleets are 100% accessible, so this is often a single default).

   1345 of 1345 trips don't say whether the vehicle is wheelchair accessible. Even with accessible stops, riders need to know the bus itself can take them.

   Effort: Often one default setting in your export.

   Agencies here usually clear this within about 1 week (based on 5 observed fixes).

NTD certification readiness: Needs attention

This feed is close to NTD-ready. Service data runs out in 30 days; renew before you certify.

Published Ready

Published at a public URL.

Valid Ready

Passes validation with no errors.

Current Needs attention

Service data runs out in 30 days; renew before you certify.

agency_id and NTD ID: Not checked yet. Setting your GTFS agency_id to your five-digit NTD ID is an optional way to line a feed up with its National Transit Database record. FTA links the two on your P-50 form, so it is not a required feed change. We don't have your NTD ID on file, so this is not checked yet.

Key facts

Feed URL

https://gtfs.gptd.cadavl.com/GPTD/GTFS/GTFS_GPTD.zip

Last checked

2026-07-09

Service window

30 days of service data remain. Last service date 2026-08-08.

State

Maine