CTA Reroutes Two Routes for Infrastructure Work

CTA reroutes Routes 4 and 115 northbound via King Drive starting April 7 for Cottage Grove work

CTA Reroutes Routes 4, 115 for Construction

Chicago's CTA will reroute two South Side bus routes starting April 7 due to construction on Cottage Grove, transit officials said. Routes #4 Cottage Grove and #115 Pullman/115th will see northbound service detoured via King Drive and 107th Street, though southbound buses won't be affected. The agency hasn't announced when the reroute will end.

Construction Prompts Service Adjustment

The reroute is necessary due to construction work taking place on Cottage Grove between 107th and 111th Streets, according to the transit agency. The CTA classified this as a planned reroute designed to minimize disruption to regular service while allowing infrastructure work to proceed. Transit agencies typically coordinate service changes with municipal construction projects to balance rider access with maintenance needs. Officials said the adjustment affects only northbound service, allowing southbound riders to continue using their regular stops.

Detour Details and Affected Stops

Northbound buses on both routes will be rerouted via King Drive and 107th Street before resuming their normal route on Cottage Grove, officials said. The detour begins at 6:00 AM on Tuesday, April 7, 2026. Southbound buses will continue to operate normally without any changes to routing or stops. Passengers are advised to allow extra travel time due to this service change, though officials didn't specify how much additional time riders should expect for their trips.

Duration Remains Undetermined

The reroute is scheduled to begin April 7 at 6:00 AM, but the end date remains to be determined, officials said. The duration will likely depend on how long construction work takes to complete on the affected Cottage Grove segment. The CTA typically announces service restoration dates once construction timelines become clearer, though officials haven't said when they'll provide that update for this project.

Staying Informed About Service Changes

Riders can contact the CTA at 1-888-YOUR-CTA for additional assistance with trip planning during the reroute. The agency provides multiple ways for customers to stay informed about service changes, including email updates and social media alerts. Moovit offers real-time updates for CTA routes, helping riders navigate detours and plan alternative trips during construction-related service changes.