With the return of University of Arizona students and the anticipation
of heavy traffic volumes in the downtown area, the City of Tucson of
Tucson Department of Transportation (TDOT) will prohibit southbound
motor vehicle travel through the Fourth Avenue Underpass at Ninth

This temporary closure will take place Thursday, August 21, Friday,
August 22 and Saturday, August 23, from 7 p.m. to 2 a.m. During the
temporary closure, the Sun Link Streetcar and bicyclists will be allowed
to use the southbound travel lane through the underpass, and pedestrians
will be allowed to use the southbound sidewalk through the underpass. 

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 gridlock conditions. TDOT
staff made permanent traffic signal timing adjustments last week on
Congress which improved traffic flows.  

Prohibiting southbound travel through the Fourth Avenue underpass
during the peak travel hours for this area is expected to further ease
the congestion along Congress Street. TDOT staff will again evaluate and
monitor travel patterns this upcoming weekend and additional traffic
control measures may take place in the future. 

Electronic message boards will be in place along Fourth Avenue to
inform motorists of this weekend’s travel lane restriction. 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.