Focus areas.

Open one lens per question. The first two groups apply across the covered corpus. Regional policy views are separated below and only apply where their source data and rules do.

Checks a validator does not run

MobilityData's canonical validator answers whether a feed follows the specification. A feed can answer yes and still strand a rider. These lenses ask the second question, about the places riders actually reach an agency through.

• Four weeks of service ahead 1556 of 2009 published feed records clear the bar

  Google and Apple want at least four weeks of upcoming service before they will show an agency. A feed can stay valid, slip under that line, and stop reaching the apps riders already have open. Every scorecard states where its feed sits, and the directory groups the calendars that have run out.

• A rider can complete the trip Reported on each scorecard

  Trips with no rideable leg, and stops that no trip serves. The file parses and the journey still does not work.

• Realtime that is actually up 0 realtime feeds monitored

  Whether a monitored realtime feed answered when we checked, and how far behind real time its data was. An agency that publishes no realtime feed is not counted here.

• The feed URL still answers Liveness recorded between full runs

  A trip planner keeps fetching the address it already has. The status page records which configured URLs responded and which have gone quiet, so a feed that moved reads as something to confirm rather than a silent gap.

Optional GTFS features

• What feeds publish Flex, fares, pathways, translations, and accessibility data

  Adoption of optional parts of GTFS, and how complete wheelchair-access data is.

United States

• NTD GTFS readiness 52.0% of assessed U.S. feeds look ready to certify

  Which U.S. feeds are published, valid, current, and identified with agency_id against the FTA requirement, with a state breakdown.

• U.S. equity overlay Where weak data meets high need

  A U.S.-specific view using domestic demographic sources and state geography.

Every lens measures published data, never a compliance determination or on-the-ground service quality, and none of them changes a grade. The first group is reported next to the rubric rather than folded into it.