Fourth Avenue Access to Downtown Detour: Traffic Congestion to Determine Detour Times

Moving forward and until further notice, southbound motor vehicle travel through the Fourth Avenue Underpass will be detoured to Stevens Avenue on Friday nights and Saturday nights on an as-needed basis if Sun Link Streetcar operations are affected. Tucson police officers will continue to provide point control starting at 7 p.m. on Fridays and Saturdays to assist with motor vehicle and pedestrian movements at the Congress Street, Fourth Avenue and Toole Avenue intersection.

After several meetings with neighborhood representatives and merchants near the Fourth Avenue Underpass, as well as traffic signal timing adjustments and reconfiguring travel on Toole Avenue, the City of Tucson Department of Transportation (TDOT) will initiate a southbound underpass detour when congestion affects streetcar operations.

When a detour is in effect, the Sun Link Streetcar, bicyclists and pedestrians will be allowed to travel southbound through the Fourth Avenue Underpass. Northbound travel through the underpass will not be affected when a detour is in place. During a detour, motorists will be directed west on Stevens Avenue, then north on Fifth Avenue, then west on Seventh Street to Sixth Avenue. Motorists can then travel south on Sixth Avenue to access Downtown.

When a detour is in place, eastbound travel on Ninth Street at Fourth Avenue will be restricted to “local traffic only” to lessen the traffic impacts to the adjacent neighborhood. Business access signs will be in place to inform motorists that businesses along Ninth Street remain open.

Motorists are urged to use caution when traveling along Fourth Avenue and in the downtown area due to the high volume of pedestrian activity in these entertainment districts.