The City of Tucson Department of Transportation (TDOT) will detour southbound motor vehicle traffic at the Fourth Avenue Underpass into Downtown to keep the Sun Link Streetcar operations on schedule. The detour will be in place Friday, September 12 and Saturday, September 13. Friday night’s detour will take place from 9 p.m. to 2 a.m.
Because of the anticipated pedestrian and motor vehicle traffic associated with the University of Arizona home football game and 2nd Saturdays Downtown, Saturday night’s detour will take place from 7 p.m. to 2 a.m.
Over the past several weeks TDOT staff has also detoured southbound motor vehicle traffic at the underpass on Thursday nights. This week TDOT staff will instead monitor the traffic flows at the Fourth Avenue Underpass/Toole Avenue/Congress Avenue intersection. If significant delays are occurring Thursday night, staff will detour southbound travel at the underpass.
The Sun Link Streetcar, bicyclists and pedestrians will not be affected by the southbound detour. As motorists approach the underpass, they will be detoured west to 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.
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.
For the past month, TDOT staff has been evaluating and monitoring traffic volumes, traffic movements and pedestrian access at the Congress Street, Fourth Avenue and Toole Avenue intersection. The increased activity in the downtown area, specifically at the Congress/Fourth/Toole intersection, has caused vehicular gridlock conditions. TDOT staff made permanent traffic signal timing adjustments several weeks ago on Congress Street which improved traffic flows. On Friday, TDOT staff will restripe westbound Toole Avenue to one way travel from Fourth Avenue Underpass/Congress Street to the eastern entrance into the Historic Depot.
Electronic message boards will be in place along Fourth Avenue to inform motorists of this weekend’s detour. 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.