Regularly scheduled tunnel cleaning will require closing eastbound Interstate 10 overnight Friday and westbound I-10 Saturday night near downtown Phoenix. Crews installing new, easier-to-read overhead signs will take advantage of the nighttime closures to complete their work in the same location. Southbound State Route 143 also will be closed this weekend while workers paint one of the newly built ramp structures. The Arizona Department of Transportation recommends drivers plan extra travel time and consider alternate routes while these restrictions are in place:

Eastbound I-10 closed between I-17 and Seventh Street near downtown Phoenix from 9 p.m. Friday to 7 a.m. Saturday (Feb. 4) for tunnel cleaning and overhead sign installation. DETOUR: All traffic will detour onto north or southbound I-17. Drivers on eastbound I-10 can use southbound I-17 to reconnect with I-10 at 24th Street near Phoenix Sky Harbor International Airport.

Westbound I-10 closed between Seventh Street and Seventh Avenue near downtown Phoenix from 9 p.m. Saturday to 7 a.m. Sunday (Feb. 5) for tunnel cleaning and overhead sign installation. Multiple on-ramps to westbound I-10 closed near work zone, including southbound SR 51; westbound Loop 202; 16th Street; Seventh Street; and HOV on-ramp at Fifth Avenue. Westbound I-10 19th Avenue off-ramp also closed. DETOUR: Exit at Seventh Street and use McDowell Road to Seventh Avenue. Drivers on westbound I-10 can also use I-17 to the Stack interchange to bypass tunnel closure.

Southbound SR 143 closed between McDowell Road and University Drive from 10 p.m. Friday to 5 a.m. Monday (Feb. 6) for structure painting and sign work. Connecting ramps to southbound SR 143 from westbound Sky Harbor Boulevard and eastbound Loop 202 also closed. DETOUR: Use 44th Street to University Drive.

Northbound SR 85 ramp to eastbound I-10 closed from 9 p.m. Sunday to 3 a.m. Monday (Feb. 6) for guard rail repair. DETOUR: Consider using Broadway Road to Miller Road.

To see other weekend restrictions related to these and other freeway projects, visit

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