CTA Reroutes Buses Around South Side Construction

CTA Routes 4 and 115 detour via King Drive due to Cottage Grove construction work

2026-04-26, Moovit News Team

CTA Reroutes Route 4 Buses for Construction

Chicago's Route 4 Cottage Grove and Route 115 Pullman/115th buses will detour around construction starting Tuesday, April 7, transit officials said. Northbound buses on both routes will use King Drive and 107th Street before returning to Cottage Grove, while southbound service continues normally. The Chicago Transit Authority said riders should plan for extra travel time during the detour.
CTA bus on Chicago's South Side street with Cottage Grove route signage visible

Construction Prompts Service Change

The reroute's necessary due to construction work on Cottage Grove between 107th and 111th Streets, according to the transit agency. Officials said the work requires closing portions of the street to through traffic, making the normal bus route temporarily impassable. The CTA didn't provide details about the nature of the construction project or which agency is performing the work. Transit agencies typically coordinate with city departments on street projects that affect bus routes to minimize rider disruption.

Detour Affects Northbound Service Only

The service change takes effect at 6:00 AM on April 7, officials confirmed. Northbound buses will leave their regular route at 107th Street, travel via King Drive, then rejoin Cottage Grove north of the construction zone. Southbound buses won't be affected and will continue operating on their normal route through the area. Officials haven't said how much additional travel time riders should expect or how many daily trips the two routes operate.

Duration Remains Undetermined

The CTA hasn't announced when the temporary reroute will end, saying the duration depends on construction progress. Officials said they'll notify riders when normal service resumes but didn't provide an estimated timeline for the project's completion. Transit agencies typically maintain detours until street work is finished and roadways are fully reopened to traffic.
CTA bus navigating detour route on South Side Chicago street with construction barriers visible in background

Riders Advised to Plan Ahead

Passengers using Routes 4 and 115 should allow extra time for their trips during the detour period, officials said. The reroute adds distance to northbound trips, though the agency didn't specify how much additional time riders should budget. Moovit provides real-time bus locations and updated arrival times for CTA routes affected by construction detours.