CTA Route 66 Detours for Viaduct Work

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 Requires Street Closure

The Chicago Department of Transportation is conducting construction work on the Chicago Avenue viaduct, requiring the temporary closure of portions of the street to bus traffic. Transit agencies typically implement detours when infrastructure projects affect regular routes, ensuring service continuity while work proceeds. Officials said the reroute will remain in place until construction is complete, though CDOT hasn't released a timeline for the viaduct project. The work is part of ongoing infrastructure maintenance across the city's transportation network.

Buses Follow Different Paths Each Direction

Eastbound route 66 buses will travel via Chicago, Milwaukee, Grand, and Orleans before resuming the normal route on Chicago Avenue. Westbound buses will operate via Chicago, Wells, and Grand before returning to the regular route on Milwaukee Avenue. The detours add several blocks to the route in each direction. Officials advised passengers to allow extra travel time due to the changes, though they didn't specify how much additional time riders should expect for their trips.

Detour Begins Monday Morning

The reroute takes effect at 9 a.m. Monday, September 29, 2025, transit officials confirmed. The agency typically implements service changes at the start of weekday service to minimize confusion during peak travel periods. Officials said the detour will continue until construction work is finished, but CDOT hasn't provided a completion date for the viaduct project.

Riders Can Track Changes in Real Time

Route 66 passengers should expect longer travel times and different stop locations during the detour period. The CTA said riders can monitor bus locations and arrival times during the reroute. Moovit provides real-time updates for CTA routes, helping riders track buses and plan trips around service changes throughout Chicago's transit network.