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Feed status · checked 2026-07-09
Marin Transit
Based on the feed this agency publishes
down 0.3 since 2026-07-08
Ahead of 43% of all tracked agencies and 40% of mid-size agencies. Operates in California.
A data-quality and completeness lens to help an agency improve its GTFS feed. Not an official compliance determination from any transit program. New to this? How to read your scorecard. Interactive view of this scorecard. Rubric v1.1, validator 8.0.1.
Checked for changes 14 minutes ago; last changed 18 days ago.
Top things to fix
Review the rule documentation for 'trip_distance_exceeds_shape_distance' at https://gtfs-validator.mobilitydata.org/rules.html and check the flagged rows in your feed.
Trip distance exceeds shape distance (flagged by the MobilityData validator). See the linked rule for what this affects.
⏱ Varies.worth about +24 points
Review the rule documentation for 'missing_required_column' at https://gtfs-validator.mobilitydata.org/rules.html and check the flagged rows in your feed.
Missing required column (flagged by the MobilityData validator). See the linked rule for what this affects.
⏱ Varies.worth about +12 points
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.
⏱ Usually a vendor support ticket.worth about +8 points
Agencies here usually clear this within about 1 week (based on 11 observed fixes).
Close the loop on each fix. Read the guide, make the change in your tool, and let the next run verify it — the scorecard shows the fix; the agency publishes it.
Review the rule documentation for 'trip_distance_exceeds_shape_distance' at https://gtfs-validator.mobilitydata.org/rules.html and check the flagged rows in your feed.
Make the change. Make this change in whatever tool produces your feed, then re-export.
Prove it cleared. The next scorecard run re-checks this automatically and, once it is gone, mints a dated receipt. Self-check a feed before you publish.
Review the rule documentation for 'missing_required_column' at https://gtfs-validator.mobilitydata.org/rules.html and check the flagged rows in your feed. · Read the fix guide
Make the change. Make this change in whatever tool produces your feed, then re-export.
Prove it cleared. The next scorecard run re-checks this automatically and, once it is gone, mints a dated receipt. Self-check a feed before you publish.
Check the trip updates endpoint with your AVL vendor; it should return a fresh GTFS-Realtime protobuf on every request. · Read the fix guide
Make the change. Make this change in whatever tool produces your feed, then re-export.
Prove it cleared. The next scorecard run re-checks this automatically and, once it is gone, mints a dated receipt. Self-check a feed before you publish.
Send your vendor a fix request
You may not control the GTFS export yourself. Copy this and send it to whoever runs your scheduling software export. It names each fix with the validator notice and a guide link.
Score by category
The MobilityData validator flagged 6 kinds of issue across 68 instances (55 error, 5 warning, 8 informational).
Service data covers the next 31 days.
100% of stops state wheelchair accessibility (71% marked accessible, 29% marked not accessible). This measures what the feed publishes, not whether a stop is physically usable. Fare data is published.
100% of stops state accessibility (71% marked accessible). Reflects what the feed states, not verified physical usability.
Fares are applied to trips.
Sampled 9 times: 0 of 3 feeds healthy; 0.0% of scheduled trips had live predictions.
Over time
Overall score across the last 20 checks — down 0.3 since 2026-07-08.
Show the numbers
| Check | Score | Change |
|---|---|---|
| 2026-06-19 | 61.1 | first check |
| 2026-06-20 | 60.8 | down 0.3 |
| 2026-06-21 | 60.5 | down 0.3 |
| 2026-06-22 | 60.1 | down 0.4 |
| 2026-06-23 | 59.8 | down 0.3 |
| 2026-06-24 | 59.5 | down 0.3 |
| 2026-06-25 | 59.1 | down 0.4 |
| 2026-06-26 | 58.8 | down 0.3 |
| 2026-06-27 | 58.5 | down 0.3 |
| 2026-06-28 | 58.1 | down 0.4 |
| 2026-06-29 | 57.8 | down 0.3 |
| 2026-06-30 | 57.5 | down 0.3 |
| 2026-07-01 | 57.1 | down 0.4 |
| 2026-07-02 | 56.8 | down 0.3 |
| 2026-07-04 | 56.1 | down 0.7 |
| 2026-07-05 | 55.8 | down 0.3 |
| 2026-07-06 | 55.5 | down 0.3 |
| 2026-07-07 | 55.1 | down 0.4 |
| 2026-07-08 | 54.8 | down 0.3 |
| 2026-07-09 | 54.5 | down 0.3 |
What changed since your last check
- Correctness no change
- Freshness down 1.6
- Rider experience no change
- Realtime quality no change
What changed in this feed
Overall score fell 0.3 points since 2026-07-08.
Same feed file as 2026-07-08; the published zip did not change.
Subscribe to this feed’s changes (Atom) to hear about grade drops in a reader, with no sign-up.
What changed over time
On 2026-06-19 this feed started at grade D. On 2026-06-23 the grade moved from D to F. As of 2026-07-09 it holds grade F.
A plain-language history of this feed, newest first.
- 2026-06-23 Grade went D to F.
Everything we checked
- Error53 instances
Trip distance exceeds shape distance (flagged by the MobilityData validator).
See the linked rule for what this affects.
Fix: Review the rule documentation for 'trip_distance_exceeds_shape_distance' at https://gtfs-validator.mobilitydata.org/rules.html and check the flagged rows in your feed. (Varies.)
Validator rule: trip_distance_exceeds_shape_distance · See MobilityData GTFS Validator rules (opens the validator rules on an external site)
- Error2 instances
Missing required column (flagged by the MobilityData validator).
See the linked rule for what this affects.
Fix: Review the rule documentation for 'missing_required_column' at https://gtfs-validator.mobilitydata.org/rules.html and check the flagged rows in your feed. (Varies.)
Validator rule: missing_required_column · Read the fix guide · See MobilityData GTFS Validator rules (opens the validator rules on an external site)
- Error1 instance
The trip updates realtime feed failed during sampling.
When this feed is down, riders see scheduled times presented as if they were live.
Fix: Check the trip updates endpoint with your AVL vendor; it should return a fresh GTFS-Realtime protobuf on every request. (Usually a vendor support ticket.)
Agencies here usually clear this within about 1 week (based on 11 observed fixes).
Validator rule: scorecard_rt_trip_updates_unreachable · Read the fix guide · See GTFS-Realtime reference (opens the GTFS-Realtime reference on an external site)
- Error1 instance
The vehicle positions realtime feed failed during sampling.
When this feed is down, riders see scheduled times presented as if they were live.
Fix: Check the vehicle positions endpoint with your AVL vendor; it should return a fresh GTFS-Realtime protobuf on every request. (Usually a vendor support ticket.)
Agencies here usually clear this within about 1 week (based on 9 observed fixes).
Validator rule: scorecard_rt_vehicle_positions_unreachable · Read the fix guide · See GTFS-Realtime reference (opens the GTFS-Realtime reference on an external site)
- Error1 instance
The service alerts realtime feed failed during sampling.
When this feed is down, riders see scheduled times presented as if they were live.
Fix: Check the service alerts endpoint with your AVL vendor; it should return a fresh GTFS-Realtime protobuf on every request. (Usually a vendor support ticket.)
Agencies here usually clear this within about 1 week (based on 5 observed fixes).
Validator rule: scorecard_rt_service_alerts_unreachable · Read the fix guide · See GTFS-Realtime reference (opens the GTFS-Realtime reference on an external site)
- Warning532 instances
532 of 1612 trips don't say whether the vehicle is wheelchair accessible.
Even with accessible stops, riders need to know the bus itself can take them.
Fix: Set wheelchair_accessible on every trip (most small-agency fleets are 100% accessible, so this is often a single default). (Often one default setting in your export.)
Agencies here usually clear this within about 1 week (based on 5 observed fixes).
Validator rule: scorecard_wheelchair_accessible_unknown · Read the fix guide · See GTFS Schedule reference (opens the GTFS Schedule reference on an external site)
- Warning15 instances
15 of 15 trips scheduled during the sampling window had no live predictions.
Riders on those trips get schedule data dressed up as realtime. Caltrans expects every operating trip in TripUpdates.
Fix: Check with your AVL vendor that every vehicle assignment flows into TripUpdates, including school-day and tripper runs. (A vendor data-mapping question.)
Agencies here usually clear this within about 1 week (based on 82 observed fixes).
Validator rule: scorecard_rt_trip_coverage · Read the fix guide · See GTFS-Realtime reference (opens the GTFS-Realtime reference on an external site)
- Warning5 instances
Some service calendars in the feed have already expired.
Expired calendars are dead weight and can hide real schedule problems from your staff and vendors.
Fix: Remove past service periods the next time you export the feed. (One setting in most export tools.)
Agencies here usually clear this within about 1 week (based on 61 observed fixes).
Validator rule: expired_calendar · Read the fix guide · See MobilityData GTFS Validator rules (opens the validator rules on an external site)
- Warning1 instance
This feed models stations or entrances but has no pathways.txt.
Trip planners can't guide riders through the station, and there is no step-free route information for wheelchair users.
Fix: Add pathways.txt connecting entrances, platforms, and any elevators, with a level for each. (Worth it for multi-level or large stations; flat stops don't need it.)
Validator rule: scorecard_station_no_pathways · Read the fix guide · See GTFS Schedule reference (opens the GTFS Schedule reference on an external site)
- Info6 instances
Unknown file (flagged by the MobilityData validator).
See the linked rule for what this affects.
Fix: Review the rule documentation for 'unknown_file' at https://gtfs-validator.mobilitydata.org/rules.html and check the flagged rows in your feed. (Varies.)
Agencies here usually clear this within about 1 week (based on 6 observed fixes).
Validator rule: unknown_file · Read the fix guide · See MobilityData GTFS Validator rules (opens the validator rules on an external site)
- Info1 instance
Feed valid beyond total service window (flagged by the MobilityData validator).
See the linked rule for what this affects.
Fix: Review the rule documentation for 'feed_valid_beyond_total_service_window' at https://gtfs-validator.mobilitydata.org/rules.html and check the flagged rows in your feed. (Varies.)
Agencies here usually clear this within about 1 week (based on 5 observed fixes).
Validator rule: feed_valid_beyond_total_service_window · See MobilityData GTFS Validator rules (opens the validator rules on an external site)
- Info1 instance
Some files contain columns that are not part of the GTFS spec.
Harmless to riders, but apps ignore these columns and they can hide typos in real column names.
Fix: Check the flagged column names for misspellings of standard GTFS fields; remove them if they are vendor extras. (A quick look at the flagged files.)
Validator rule: unknown_column · Read the fix guide · See MobilityData GTFS Validator rules (opens the validator rules on an external site)
Beyond the grade
Opportunities that do not change your grade today: fare detail, on-demand service, and deeper accessibility data.
8 route badge(s) pair a color and text color below the WCAG 4.5:1 contrast bar (71, 219, 228, 245, 49, and more).
Consider: Adjust route_color or route_text_color so each pair clears 4.5:1. Often switching the text between black and white is enough.
This feed models stations or entrances but has no pathways.txt and levels.txt.
Consider: Add pathways.txt connecting entrances, platforms, and elevators, and levels.txt for each floor, so the step-free route is described.
NTD certification readiness Needs attention
This feed is close to NTD-ready. 2 validator errors to resolve.
- Published Ready
- Published at a public URL.
- Valid Needs attention
- 2 validator errors to resolve.
- Current Ready
- Service data covers the next 31 days.
- agency_id matches your NTD ID Not aligned
- 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, so a difference here is a heads-up, not an error. Optionally set the agency_id for your service to 90234 in agency.txt (and the matching agency_id in routes.txt) so the feed lines up with your NTD record. It is a convenience, not a required feed change: FTA also links agency_id to your NTD ID on your P-50 form.
In plain words: if you report to the federal transit database, you have to publish a working, up-to-date feed and confirm it once a year. This box is a heads-up on whether yours looks ready; it is not the official sign-off.
A readiness signal mapping this feed to the FTA National Transit Database GTFS requirement (Report Year 2023 onward: a public, valid, current feed, certified annually on the D-10). Aligning agency_id with your NTD ID lets the feed line up with your NTD record; the July 2025 final rule links the two on the P-50 form rather than requiring that feed change, and requires shapes.txt in the published GTFS: Full Reporters from Report Year 2025, and Reduced, Rural, and Tribal Reporters from Report Year 2026. Not an official determination; your certification is the official check.
Conformance mark Not yet
This feed is close to the conformance mark. 2 validator errors to resolve. States wheelchair access on 100% of stops and 67% of trips; the mark needs 90% of each.
- Valid Not yet
- 2 validator errors to resolve.
- Current Met
- Service data covers the next 31 days.
- Accessible Not yet
- States wheelchair access on 100% of stops and 67% of trips; the mark needs 90% of each.
In plain words: earn this mark when your feed passes validation, has not expired, and says whether nearly every stop and trip is wheelchair accessible.
A pass credential for a feed that is valid, current, and states wheelchair access on nearly every stop and trip. Accessibility here measures what the feed publishes, not whether a stop is physically usable. How the conformance mark works.
Realtime reliability
The realtime feed responded on 0.0% of 105 checks over the last 16 days, with lag not reported by the feed.
Sampled on a schedule between full scores, so this tracks uptime and freshness over time rather than at a single moment.
Clears the Google and Apple Maps four-week coverage bar. This feed has 31 days of service ahead, clearing the four-week (28-day) window Maps asks for. The feed also carries 55 validator errors, the other thing Maps checks at onboarding; the findings below name each fix.
How this agency maps to the standards
A data-quality lens, not a compliance determination. Each category shows this feed's score and the standards it relates to: the FTA National Transit Database GTFS requirement, the MobilityData grading scheme, and the Google Transit gate. Read the full standards crosswalk.
In California, the published guideline is California Transit Data Guidelines. Caltrans' published quality guidelines and compliance checklist; this rubric is anchored to them.
California Minimum GTFS Guidelines checklist (3 of 5 measured items met)
The state's own Data Process Checklist, matched item by item to what this scorecard already measures. An item marked "not measured here" is real ground the checklist covers that this tool does not check; see the official checklist for the full picture.
- Meets Publish GTFS Schedule at a stable, automatically-fetchable URL
The published feed URL downloaded at the last check.
- Not measured here Implement required fields: Fares v2, text-to-speech stop names, shapes.txt, wheelchair_boarding, and Pathways where applicable
This scorecard measures wheelchair_boarding, shapes.txt coverage, fare data, and station pathways separately, below; it does not check the Fares v2 format specifically or text-to-speech stop names.
- Not measured here Achieve a passing score in every category of the MobilityData GTFS Grading Scheme v1
This scorecard automates a proxy for the Grading Scheme's rider-facing fields (see the standards crosswalk) rather than running the scheme itself, which grades by comparison to the real world by hand.
- Not measured here Publish changes to the base schedule at least one week ahead of every service change
This scorecard does not track a feed's publish history, so advance notice cannot be checked.
- Gap Produce no critical errors in the MobilityData GTFS Validator
2 validator errors to resolve.
- Not measured here Publish Trip Updates, Vehicle Positions, and Alerts feeds
This scorecard checks realtime reachability and freshness overall; it does not check for all three feed types individually.
- Not measured here Update Trip Updates and Vehicle Positions at least every 20 seconds
This scorecard samples realtime freshness; it does not check this specific 20-second cadence.
- Not measured here Publish information for at least 99% of vehicles in service
This scorecard measures the share of scheduled trips represented in TripUpdates, a related but different figure than vehicle coverage.
- Not measured here Keep 100% of trip_ids consistent between Schedule and Realtime
This scorecard does not currently check trip_id consistency between the Schedule and Realtime feeds.
- Not measured here Produce no critical errors in the Center for Urban Transportation Research realtime validator
This scorecard does not run the CUTR realtime validator.
- Not measured here Publish accessible feed links on the agency or regional partner website
This scorecard does not check the agency's own website.
- Not measured here Register GTFS and GTFS-Realtime feeds with transit.land and the Mobility Database
This scorecard does not currently check aggregator registration for this section.
- Meets Designate a technical contact in feed_info.txt's feed_contact_email
feed_info.txt states a technical contact.
- Gap wheelchair_boarding stated on stops and trips
States wheelchair access on 100% of stops and 67% of trips.
- Not measured here shapes.txt with a shape for every trip
Shape coverage has not been measured for this feed.
- Meets Fare data published, or the service marked fare-free
Fare data is published.
- Correctness 58 / 100
- GTFS Schedule best practices, checked by the MobilityData validator. MobilityData grading: stop locations, route names and colors. Google Transit: a feed must pass validation to stay in Maps.
- Freshness 52 / 100
- The FTA National Transit Database expectation of a valid, current feed. Google Transit: an expired calendar drops the agency from Maps.
- Rider experience 95 / 100
- GTFS Best Practices for rider-facing fields. MobilityData grading: stop names and headsigns.
- Realtime quality 0 / 100
- GTFS-Realtime best practices: a stable URL, high uptime, and frequent updates.
Show your grade
Put a live badge on your agency site or feed README. It updates daily and links back to this scorecard.
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Cite this record
This page updates on every check. The record below does not: it is the dated file this grade came from, published at https://gtfsscorecard.org/data/artifacts/marin-transit-2937/2026-07-09.json and never overwritten, pinning the grade, category scores, rubric version, validator version, and the scored feed's sha256 as they stood on 2026-07-09. Use it in a board packet, an NTD narrative, or a research citation instead of linking the live page, whose content will differ on your next visit.
Citing the tool itself rather than one agency's record? Use the repo's CITATION.cff.