Call-prep brief · checked 2026-09-13

Marin Transit

Grade A · 92.2 / 100

Up 28.9 points since 2026-09-12 (D to A).

For this call: lead with the grade and the three fixes below, then confirm the feed is current and the NTD details line up. Each fix is framed as a next step, not a failure.

What changed since the last check

Correctness up 9.0
Freshness up 100.0
Rider experience no change

Top three things to fix

Add the required column named in the finding to the flagged file.
A file is missing a column that GTFS requires. Apps may reject the whole file, so riders could lose the affected routes or stops.
Effort: Often an export setting; ask your vendor if it recurs.
Set wheelchair_accessible on every trip. If every vehicle is accessible, this may be one default; otherwise use the value for each trip.
535 of 1613 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: A default or per-trip field in your export.
Check the flagged file name for a typo of a standard GTFS file. Remove it if it is a vendor extra.
The feed includes a file that is not part of the GTFS spec. Apps ignore files they don't know, and a stray file can hide a misspelled standard file name.
Effort: A quick look at the flagged file.

Finding handoff

Move one finding to a recheck

Select one finding. Copy the request, make the change in the feed-producing tool, then compare the next complete run.

Feed evidence: A file is missing a column that GTFS requires.
Next action: Add the required column named in the finding to the flagged file.
Recheck: Publish the changed feed at the same URL. On the next complete, comparable scorecard run, confirm that this finding is no longer reported.

Copy handoff text

Agency: Marin Transit
Finding: missing_required_column
Feed evidence: A file is missing a column that GTFS requires.
Why it matters: Apps may reject the whole file, so riders could lose the affected routes or stops.
Requested change: Add the required column named in the finding to the flagged file.
Recheck: Publish the changed feed at the same URL. On the next complete, comparable scorecard run, confirm that this finding is no longer reported.
Evidence: https://gtfsscorecard.org/agency/marin-transit/?finding=missing_required_column#finding-handoff

NTD GTFS readiness: Needs attention

This feed is close to NTD-ready. 1 validator error to resolve.

Published Ready: Published at a public URL.
Valid Needs attention: 1 validator error to resolve.
Current Ready: Service data covers the next 118 days.
agency_id provided Ready: agency.txt provides agency_id. For RY2026, keep one stable value for each NTD reporter represented in the feed and crosswalk each value on the P-50 form.

agency_id equals NTD ID (optional): Different (allowed). Your feed's agency_id is 33; your National Transit Database ID is 90234. A feed that serves several agencies (a shared regional feed) can legitimately carry more than one agency_id. The values do not need to equal the five-digit NTD ID, so this difference is allowed and carries no score. Confirm that P-50 crosswalks agency_id 33 to NTD ID 90234, and keep the feed value stable. Do not change it solely to make the two values equal.

The bar this score answers to

The published guideline in is California Transit Data Guidelines. Caltrans' published quality guidelines and compliance checklist; this rubric is anchored to them.

Key facts

Feed URL: http://www.marintransit.org/data/google_transit.zip
Last checked: 2026-09-13
Service window: 118 days of service data remain. Last service date 2027-01-09.
Feed version: UTC: 04-Feb-2026 00:08
Location: California

A data-quality and completeness read to support an agency conversation. Not an official compliance determination. Rubric v1.3, validator 8.0.1.