Data feeds which provide a pathway for developers to retrieve estimated arrival times, bus stop lists, route patterns, vehicle location information and more from the CTA Bus Tracker (SM) service and incorporate it into third-party apps and projects.

General Transit Feed Specification (formerly "Google Transit Feed Specification") data package for CTA system, including stops, route patterns and full service schedule.

Data feed that provides a pathway for developers to retrieve estimated arrival times from the CTA Train Tracker (SM) service and incorporate it into third-party apps and projects.

These feeds of information help developers to get the latest information about planned and unplanned events that affect CTA services.