Chicago Route 4 Detours — But Service Adapts
CTA Route 4 southbound buses detour via Vincennes due to street conditions since July 8
CTA Route 4 Detours on Chicago's South Side
Chicago's Route 4 Cottage Grove bus is detouring around a section of the South Side, affecting riders who board between 43rd and 51st streets. The Chicago Transit Authority implemented the detour July 8 due to street conditions, transit officials said. The 11.8-mile route serves as a major north-south corridor on the South Side, and the agency hasn't said when normal service will resume.
The detour affects only southbound buses, which now travel via 43rd Street, Vincennes Avenue, and 51st Street instead of continuing on Cottage Grove, according to the transit agency. Northbound service operates normally. Route 4 is one of 129 bus routes CTA operates across Chicago and 40 surrounding suburbs. Officials didn't specify what street conditions prompted the change.
Stops along Cottage Grove between 43rd and 51st streets aren't being served during the detour, CTA confirmed. The agency classified the alert as high severity, indicating significant impact to regular service patterns. Specific details about how many stops are affected or how many riders use those stops daily weren't available. Officials said riders should expect changes to their usual boarding locations.
The detour took effect July 8, transit officials said, though the agency hasn't announced when normal routing will resume. CTA didn't provide a timeline for resolving the street conditions that prompted the change. The agency typically posts service alerts on its website when disruptions occur, but duration estimates weren't included in this alert.
Riders who normally board at affected stops should plan alternate routes or walk to nearby stops on the detour path, according to the transit agency. CTA officials recommend allowing extra travel time and checking for updates before trips. Moovit provides real-time updates for CTA routes including current detours and service changes.
