GTFS Scorecard: Hillsborough Area Regional Transit (HART) feed quality changes Grade moves, expiry warnings, and score swings for Hillsborough Area Regional Transit (HART)'s GTFS feed. tag:gtfsscorecard.org,2026:agency/hillsborough-area-regional-transit-hart/changes 2026-06-28T00:00:00Z GTFS Scorecard GTFS Scorecard Hillsborough Area Regional Transit (HART): Grade went D to F. tag:gtfsscorecard.org,2026:agency/hillsborough-area-regional-transit-hart/2026-06-28/grade_change 2026-06-28T00:00:00Z Grade went D to F.