CTA GTFS Schedule Feed
CTA publishes a GTFS (General Transit Feed Specification) schedule feed covering the physical layout, stop locations, and static schedules for the entire CTA bus and L train system. The feed is a downloadable ZIP archive that conforms to the GTFS reference and is updated when CTA service changes.
Documentation
Other Resources
Feed
https://www.transitchicago.com/downloads/sch_data/google_transit.zip
DataGov
https://catalog.data.gov/dataset/cta-system-information-developer-tool-gtfs-data
Transitland
https://www.transit.land/feeds/f-dp3-cta
ChicagoDataPortal
https://data.cityofchicago.org/Transportation/CTA-System-Information-Developer-Tool-GTFS-Data/sp6w-yusg