Chicago CTA Reroutes Route 4 for Construction

CTA reroutes northbound Route 4 buses via King Drive for Cottage Grove construction

CTA Reroutes Route 4 Buses for Construction

Northbound riders on Chicago's Route 4 Cottage Grove will need to adjust their commutes starting Tuesday, April 7. The Chicago Transit Authority announced a temporary reroute for northbound #4 Cottage Grove and #115 Pullman/115th buses due to construction work on Cottage Grove between 107th and 111th streets. Southbound service won't be affected by the change, officials said.

Construction Prompts Service Adjustment

The reroute stems from ongoing construction work on a four-block stretch of Cottage Grove Avenue on Chicago's Far South Side. Transit officials said the work requires temporarily closing portions of the street to through traffic, making it impossible for buses to maintain their normal route. The CTA regularly adjusts bus routes to accommodate infrastructure projects throughout the city. Officials didn't provide details about the specific nature of the construction work or which agency is overseeing the project.

Buses Will Use King Drive Detour

Affected northbound buses will detour via King Drive and 107th Street before resuming their regular route on Cottage Grove, according to the transit agency. The detour adds approximately four blocks to the route's path through the construction zone. Officials said passengers should allow extra travel time when using these routes during the reroute period. The change takes effect at 6:00 AM on Tuesday, April 7, 2026, though officials haven't announced when the reroute will end or how long the construction work is expected to last.

Timeline Remains Open-Ended

The reroute begins Tuesday morning, but the CTA hasn't provided an end date for the service change. Transit officials said the duration will depend on how long the construction work takes to complete. The agency typically announces reroute end dates once contractors provide firm completion timelines, though weather and unforeseen complications can extend infrastructure projects beyond initial estimates.

Riders Can Track Detour in Real Time

Passengers on affected routes should plan for potential delays during the reroute period, officials said. The detour may add several minutes to travel times depending on traffic conditions along King Drive. Riders can track bus locations and receive updated arrival times through Moovit, which provides real-time transit information for CTA routes throughout Chicago. The transit agency said it will announce the reroute's end date once construction work nears completion.