This package is not currently in any snapshots. If you're interested in using it, we recommend adding it to Stackage Nightly. Doing so will make builds more reliable, and allow stackage.org to host generated Haddocks.
GTFS is used by transit agencies to provide schedules, geographic
information, etc. to Google Maps and other Google applications. Many data
sets are available online, often with few restrictions, so the format is
useful to third-party developers.