# CTA graphic provenance — 2026-09-15

Official source: https://www.transitchicago.com/assets/1/6/ctaicons.zip
Branding rules: https://www.transitchicago.com/developers/branding/
Developer agreement: https://www.transitchicago.com/developers/terms/

The service bus pictogram and CTA standard L train icon may be used with transit service information. The circular CTA agency logo is excluded. The two Tracker icons appear only in credit lines accompanying the respective API reports. Their shapes and supplied colors are unchanged. SVG groups were extracted from the official developer sheet; no official map or other artwork is bundled.

CTA Bus Tracker and CTA Train Tracker logo icons are trademarks of the Chicago Transit Authority. This application is independent, neither made nor endorsed by CTA. Source and license notices remain separate from the app's original code.