Our Northcentral District administrator explains big projects his staff is working on, including improving Interstate 17 pavement south of Flagstaff and replacing the I-17 bridge at J.W. Powell Boulevard. He also explains how ADOT personnel deal with the challenge of severe winter weather.
Summer is still in full swing, but ADOT is already gearing up for winter.
BWC Work Zone
The Arizona Department of Transportation is advising motorists to plan ahead and expect delays as westbound I-10 will be closed between SR 143 and I-17 from 10 p.m. Friday, Sept. 13, to 4 a.m. Monday
We're excited to share that an ADOT project that added Loop 303 interchanges at 43rd and 51st avenues is a national finalist for top honors in the 2024 America’s Transportation Awards. We also want Arizonans to know that one of those honors, the People’s Choice Award, is decided by the public.  
Though it’s no longer open to cars, the Walnut Canyon Bridge near Flagstaff has been standing for 100 years.
911

51st Avenue at Loop 101 to be closed nightly Aug. 4-8 
Additional overnight and long-term ramp closures scheduled over next two weeks

The Arizona Department of Transportation advises drivers to plan for the following closures and restrictions, as part of the Loop 101, 75th Avenue to I-17 widening project.

  • 51st Avenue will be closed at Loop 101 nightly, from 10 p.m. to 5 a.m. beginning Monday, Aug. 4, and ending the morning of Friday, Aug. 8
    • DETOUR: Drivers may use the east- and westbound frontage roads to navigate around the closure.
  • The westbound Loop 101 on-ramp at 59th Avenue will be closed from 11:30 p.m. Monday, Aug. 4, to 5 a.m. Tuesday, Aug. 5.

Upcoming 31st Avenue overnight closures

  • 31st Avenue will be closed at Loop 101 nightly, from 10 p.m. to 5 a.m. beginning Monday, Aug. 11, and ending the morning of Friday, Aug. 15. 
    • DETOUR: Drivers may use the east- and westbound frontage roads to navigate around the closure.
       

LONG-TERM RAMP CLOSURES

Westbound Loop 101 off-ramp at 67th Avenue will be closed for approximately 60 days, beginning 11:30 p.m. Monday, Aug. 4.

  • DETOUR: Drivers may exit at 59th Avenue and use the frontage road (Beardsley Road) or Union Hills Drive to reach 67th Avenue.

Westbound Loop 101 on-ramp at 59th Avenue will be closed for approximately 60 days beginning 11:30 p.m. Monday, Aug. 11.

  • DETOUR: Drivers may use the westbound frontage road (Beardsley Road) or Union Hills Drive to 67th avenue to reach westbound Loop 101.

UPDATED: Eastbound Loop 101 off-ramp at 27th Avenue will be closed for approximately 60 days beginning 11:30 p.m. Monday, July 28.

  • DETOUR: Drivers may exit at 35th Avenue and use either the frontage road (Beardsley Road) or Union Hills Drive to reach 27th Avenue.

Eastbound Loop 101 off-ramp at 51st Avenue will be closed for approximately 60 days beginning 11:30 p.m. Monday, July 21.

  • DETOUR: Drivers may exit at 59th Avenue and use either the frontage road (Beardsley Road) or Union Hills Drive to reach 51st Avenue.

 

ONGOING RESTRICTIONS

Lane restrictions are ongoing at the following locations for bridge work and frontage road improvements.

At the 51st and 35th avenue interchanges:

  • All on- and off-ramps will be narrowed to one lane
  • The left-turn lane for both east- and westbound on-ramps will be narrowed to one lane
  • 51st and 35th avenues will be narrowed to one lane under Loop 101

At the 31st Avenue interchange:

  • The 31st Avenue shoulders will be closed under Loop 101. Pedestrian access is still available.

Frontage roads:

Much of the work on the frontage roads was completed in March 2025. Short-term periodic restrictions on the frontage roads may be needed in the future.

Close alert
Map of I-10 Ina to Ruthrauff widening project
New westbound Interstate 10 lanes opened early Wednesday morning between Orange Grove and Ina roads in the northwest Tucson area as part of a larger project to improve safety and traffic flow.
Map of I-17 southbound restriction this weekend
To help keep traffic moving through the work zone, Loop 303/Sonoran Desert Drive will be closed under I-17. Eastbound Loop 303 traffic can reach northbound I-17 by taking I-17 southbound to Happy
Map of I-10 Ina to Ruthrauff widening project
A planned traffic shift to new westbound Interstate 10 lanes at Orange Grove Road has been postponed due to a mechanical issue with lane striping equipment, according to the Arizona Department of