Extension projects

GTFS is designed to evolve to meet new needs. The mobility community shares needs as they arise and suggest ways to add them as extensions to the spec.

Ongoing extension projects

MobilityData maintains a list of spec extension ideas from across the community at bit.ly/gtfs-extensions.

Use the tool (or email us specifications@mobilitydata.org) to submit:

  • new needs or ideas

  • proposals

  • your interest in being a producer/consumer of an extension


Everyone is also welcome participate in the discussions at github.com/google/transit/issues.

GTFS amendment process

The process to changing the spec can be found be found here at the links below.