GTFS Scorecard: Massport feed quality changes Grade moves, expiry warnings, and score swings for Massport's GTFS feed. tag:gtfsscorecard.org,2026:agency/massport/changes 2026-07-06T00:00:00Z GTFS Scorecard GTFS Scorecard Massport: Grade went A to B. tag:gtfsscorecard.org,2026:agency/massport/2026-07-06/grade_change 2026-07-06T00:00:00Z Grade went A to B.