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 tonight, September 4, Friday, September 5 and Saturday, September 6 from 9 p.m. to 2 a.m. The northbound travel lane at the Fourth Avenue Underpass from downtown will remain open at all times.
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 several weeks, 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.
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.