Chicago Transit Authority (CTA)

What changed since the last check

• Correctness no change
• Freshness down 1.6
• Rider experience no change

Top three things to fix

1. Re-export with a validity window that reaches at least 60 days out.

   Service data runs out in 22 day(s). When the calendar runs out, trip planners stop showing this agency. Fixing it now is calmer than after riders notice.

   Effort: One export setting.

   Agencies here usually clear this within about 1 week (based on 61 observed fixes).

2. Review the rule documentation for 'equal_shape_distance_diff_coordinates' at https://gtfs-validator.mobilitydata.org/rules.html and check the flagged rows in your feed.

   Equal shape distance diff coordinates (flagged by the MobilityData validator). See the linked rule for what this affects.

   Effort: Varies.

3. Populate trip_headsign to match what the bus displays.

   94420 of 94420 trips have no headsign. Riders at the stop can't tell which direction a bus is going.

   Effort: Usually a bulk edit in your scheduling software.

Ready to send to the agency

Hi Chicago Transit Authority (CTA) team, Service data runs out in 22 day(s). When the calendar runs out, trip planners stop showing this agency. Fixing it now is calmer than after riders notice. The fix is usually one export setting: Re-export with a validity window that reaches at least 60 days out. This came from your GTFS data quality scorecard, which checks the feed you publish and lists the fixes in plain language: https://gtfsscorecard.org/agency/chicago-transit-authority-cta/

Copy this note from the full scorecard.

NTD certification readiness: Needs attention

This feed is close to NTD-ready. 1 validator error to resolve. Service data runs out in 22 days; renew before you certify.

Published Ready

Published at a public URL.

Valid Needs attention

1 validator error to resolve.

Current Needs attention

Service data runs out in 22 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

http://www.transitchicago.com/downloads/sch_data/google_transit.zip

Last checked

2026-07-09

Service window

22 days of service data remain. Last service date 2026-07-31.

State

Illinois