GTFS Scorecard: Detroit People Mover feed quality changes Grade moves, expiry warnings, and score swings for Detroit People Mover's GTFS feed. tag:gtfsscorecard.org,2026:agency/detroit-people-mover-2281/changes 2026-06-26T00:00:00Z GTFS Scorecard GTFS Scorecard Detroit People Mover: Grade went C to B, correctness rose 6 points. tag:gtfsscorecard.org,2026:agency/detroit-people-mover-2281/2026-06-26/grade_change 2026-06-26T00:00:00Z Grade went C to B, correctness rose 6 points.