Data provided by Chicago Transit Authority through the City of Chicago Data Portal.
Source: https://data.cityofchicago.org/Transportation/CTA-L-Rail-Lines/xbyr-jnvx
Dataset time period: November 2023; rows updated July 23, 2024; retrieved October 31, 2026.
This is approximate geographic line geometry, not current service, live arrivals or schedules.
Shared named segments are displayed in parallel using the source's line names; no extra coverage is inferred.
The app is not made, sponsored or endorsed by CTA. No CTA logo or official map is reproduced.
CTA data license and terms: https://www.transitchicago.com/developers/terms/
CTA route color specifications: https://www.transitchicago.com/developers/branding/
CTA retains its rights in the source data. The developer terms permit this in-app transit-rider use and caching.
Pinned raw source and provenance are retained in datasets/cta in the source repository. Refresh that reviewed snapshot explicitly when CTA updates it; application clients never call CTA automatically.