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