Chicago Transit Authority (CTA)

What this grade measures

The quality of the schedule data in the feed scored here for trip-planning apps: whether riders using Google Maps, Apple Maps, or Transit see current, correct, and complete information. It measures the data feed, not service quality or operations.

Progress this period

No newly cleared items this period. The score and trend above reflect where the feed stands today.

What needs attention next

Three improvements, in priority order, each sized so the board can see what it is approving:

1. 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.

   This is a validator notice, and the validator decides what each instance covers, so no share of the network can be read from it here.

   Estimated effort: Varies.

2. Add feed_info.txt with feed_start_date and feed_end_date to your export.

   feed_info.txt is missing its start/end dates (the file itself is absent) Apps and this scorecard can't warn anyone before the feed goes stale without stated validity dates.

   This one is about the feed as a whole, so there is no share of it to count.

   Estimated effort: Two fields, set once in export settings.

3. Add fare_attributes.txt (or Fares v2 files) with your fare structure. If your service is fare-free, ask to have it marked fare-free instead.

   The feed contains no fare information. Riders see 'fare unknown' in trip planners and can't budget their trip; visitors are most affected.

   This one is about the feed as a whole, so there is no share of it to count.

   Estimated effort: A small file for most flat-fare systems.