GTFS (General Transit Feed Specification)

A data specification that allows public transport operators to publish their transit data in a format that can be consumed by a wide variety of software applications. Today, the GTFS data format covers both static and real-time data and is used by thousands of public transport providers.

You can learn more about the GTFS specification in detail at GTFS.org and at developers.google.com/transit.

GTFS was originally written by Google and is similar to the TransXChange and SIRI formats used widely in the UK. Many public transport operators release this data as open data. A good source of GTFS data in the UK is Passenger’s open data portal.