CTA Route 66 Detours for Viaduct Repairs

CTA Route 66 detours around Chicago Avenue viaduct construction starting Monday

CTA Reroutes Route 66 for Viaduct Work

Chicago Transit Authority's route 66 will detour around construction starting Monday, September 29, at 9 a.m., officials said. The temporary reroute affects both eastbound and westbound buses along Chicago Avenue due to viaduct work by the Chicago Department of Transportation. Officials haven't announced when the detour will end.

Construction Forces Service Changes

The reroute is necessary because CDOT is conducting construction work on the Chicago Avenue viaduct, according to the transit agency. Officials said the infrastructure work requires temporary street closures that prevent buses from using their normal route. Transit agencies typically coordinate with city departments on construction projects that affect service, though specific details about the viaduct project's scope weren't provided. The work represents ongoing efforts to maintain Chicago's aging transportation infrastructure.

Detour Routes Outlined for Riders

Eastbound buses will be diverted via Chicago, Milwaukee, Grand, and Orleans before resuming their normal route on Chicago Avenue, officials said. Westbound buses will operate via Chicago, Wells, and Grand before returning to their regular route on Milwaukee Avenue. The detours add several blocks to the route in each direction. Passengers are advised to allow extra travel time due to these changes, though officials didn't specify how much additional time riders should expect.

Changes Take Effect Monday Morning

The service modifications begin Monday, September 29, 2025, at 9 a.m., the CTA confirmed. Officials haven't provided an end date for the temporary reroute, saying the duration depends on CDOT's construction timeline. The agency typically announces service restorations once infrastructure work is completed and streets reopen to normal traffic patterns.

Real-Time Updates Available to Riders

Route 66 riders should expect modified service patterns throughout the construction period. The detour is one of multiple service alerts currently affecting CTA bus routes across the system. Riders can track their buses and plan trips around the temporary changes. Moovit provides real-time updates for CTA routes, helping passengers navigate service modifications and find the fastest available connections during construction-related detours.