Traffic Alerts - I-40, Fourth Street Bridge widening and Butler Avenue

REMINDER: Extended closure of Fourth Street bridge over Interstate 40 in Flagstaff planned for July 17 - Aug. 3

Drivers should expect delays and allow extra travel time

The Arizona Department of Transportation advises drivers to plan for an extended closure of the Fourth Street bridge over Interstate 40 from 8 p.m. Friday, July 17, to 5 a.m. Monday, Aug. 3, as work continues on the bridge replacement project.

Pedestrians, bicyclists and emergency vehicles will have access across Fourth Street during the 17-day closure. Drivers can use Huntington Drive or Soliere Avenue as an alternate route during the closure.

The traffic signal at Fourth Street and Butler Avenue suffered extensive damage due to a collision. The city of Flagstaff is working with a contractor to conduct the necessary repairs. Until the repair is completed, the intersection will remain a four-way stop.

During the extended closure of Fourth Street, the following traffic restrictions on I-40 also will be in place: 

Eastbound I-40 narrowed to one lane at Fourth Street  

  • 8 p.m. Friday, July 17, to 6 p.m. Saturday, July 18.
  • 8 p.m. Tuesday, July 21, to 6 a.m. Thursday, July 23.
  • 8 p.m. Thursday, July 23, and ending at 12:30 a.m. Saturday, July 25.

Westbound I-40 narrowed to one lane at Fourth Street  

  • 6 p.m. Saturday, July 18, to 6 a.m. Monday, July 20.
  • 6 a.m. to 8 p.m. Thursday, July 23.
  • 12:30 a.m. Sunday, July 26, and ending at 6 a.m. Wednesday, July 29.

During the lane restrictions, east- and westbound I-40 traffic will be shifted to one side of the highway in a temporary configuration through the work zone.

ADOT advises drivers to slow down and use caution around construction personnel and equipment while construction is underway.

Schedules are subject to change based on weather and other unforeseen factors. For more information, please call the ADOT Bilingual Project Information Line at 855.712.8530 or go to and select Projects from the drop-down menu. For real-time highway conditions statewide, visit ADOT’s Traveler Information Site at, follow ADOT on Twitter (@ArizonaDOT) or call 511, except while driving.