Obtain Google Formatted Data From Public Transit Systems like NY Subway, Caltrain

See transitland

See: https://github.com/MobilityData/gtfs-realtime-bindings/tree/master/java

See: https://github.com/google/transit/tree/master/gtfs-realtime

See: https://transit.land/feed-registry/?country=US&sort_key=country

See: https://developers.google.com/transit/

Realtime / Live Transit

https://developers.google.com/transit/gtfs-realtime/

https://developers.google.com/transit/gtfs-realtime/examples/alerts

http://transitfeeds.com/news/open-mobility-data

https://www.transitwiki.org/TransitWiki/index.php?title=Publicly-accessible_public_transportation_data