GTFS-flex

GTFS-flex is a proposed/prototype extension to the General Transit Feed Specification. see this page for more detail on the standard. GTFS-flex would add the capability to model various demand-responsive transportation (DRT) services to GTFS, which currently only models fixed-route public transportation. GTFS-flex is in a prototyping phase in which its capabilities to model transportation services are being tested and adapted. There is no software that currently consumes GTFS-flex data, though projects have been proposed. }}