A collection of blogs where we can get ideas:
- https://medium.com/transit-app
- Rome2Rio
- Citymapper
- https://onebusaway.org/trip-planning-on-android-phone-turned-off-for-now/
- https://transitfeeds.com/p/societe-nationale-des-chemins-de-fer-belges/528
- Info on GTFS: https://docs.google.com/document/d/16inL5BVcM1aU-_DcFJay_tC6Ni0wPa0nvQEstueG5k4/edit#heading=h.6tmm1age7rdr