Call-prep brief · checked 2026-08-01
VBB GTFS-Flex demand-responsive services
Grade F · 49.1 / 100
Unchanged since 2026-07-31.
For this call: lead with the grade and the three fixes below, then confirm the feed is current and the rider information is complete. Each fix is framed as a next step, not a failure.
What changed since the last check
- Correctness no change
- Freshness no change
- Rider experience no change
Top three things to fix
Review the rule documentation for 'missing_prior_notice_duration_min' at https://gtfs-validator.mobilitydata.org/rules.html and check the flagged rows in your feed.
Missing prior notice duration min (flagged by the MobilityData validator). See the linked rule for what this affects.
Effort: Varies.
Review the rule documentation for 'invalid_url' at https://gtfs-validator.mobilitydata.org/rules.html and check the flagged rows in your feed.
Invalid url (flagged by the MobilityData validator). See the linked rule for what this affects.
Effort: Varies.
Set wheelchair_boarding to 1 (accessible) or 2 (not accessible) for every stop. A field survey can start with the busiest stops.
945 of 945 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.
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
- Missing prior notice duration min (flagged by the MobilityData validator).
- Next action
- Review the rule documentation for 'missing_prior_notice_duration_min' at https://gtfs-validator.mobilitydata.org/rules.html and check the flagged rows in your feed.
- 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
- Feed evidence
- Invalid url (flagged by the MobilityData validator).
- Next action
- Review the rule documentation for 'invalid_url' at https://gtfs-validator.mobilitydata.org/rules.html and check the flagged rows in your feed.
- 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
- Feed evidence
- 945 of 945 stops don't say whether a wheelchair user can board there.
- Next action
- Set wheelchair_boarding to 1 (accessible) or 2 (not accessible) for every stop. A field survey can start with the busiest stops.
- 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
Key facts
- Feed URL
- https://unternehmen.vbb.de/fileadmin/user_upload/VBB/Dokumente/API-Datensaetze/gtfs-flex.zip
- Last checked
- 2026-08-01
- Service window
- 133 days of service data remain. Last service date 2026-12-12.
- Location
- Berlin, Germany
A data-quality and completeness read to support an agency conversation. Not an official compliance determination. Rubric v1.3, validator 8.0.1.