Traffic Alerts - Rio de Flag Bridge Replacement

UPDATE: Traffic shift on eastbound Historic Route 66 in Flagstaff scheduled through Feb. 8

Drivers should use caution and allow extra travel time

The Arizona Department of Transportation is advising motorists who use eastbound Historic Route 66 (B40) in Flagstaff to expect a traffic shift as crews construct wing walls for the Rio De Flag Bridge Replacement project.

The work, which is currently underway, is scheduled weekdays from 6 a.m. to 5 p.m. through Monday, Feb. 8. The eastbound travel lanes will be shifted to the north, by one lane, and the left-turn lane to northbound US 180 will be closed.

Two lanes of traffic will be maintained in each direction on Historic Route 66 while work is underway during the two-week period.

To prepare for the traffic shift, motorists should also expect the following restrictions:

  • The speed limit will be reduced to 25 mph between Butler Avenue and Beaver Street
  • No left turns at Santa Fe Avenue and US 180 (Humphreys Street).

During the traffic shift, eastbound Historic Route 66 to northbound US 180 (Humphreys Street) traffic will be detoured to north San Francisco Street to west Columbus Avenue to access north US 180 (Humphreys Street).

Drivers should proceed through the work zone with caution, slow down and watch for construction personnel and equipment.

Stay Informed!

ADOT will provide more information about project schedules and potential traffic impacts as information becomes available.

  • By email: Subscribe to receive project updates and traffic alerts.
  • By phone:  Call the ADOT Bilingual Project Information Line at 855.712.8530.
  • Online: Submit a question or comment through the ADOT website. Visit and then select Projects from the dropdown menu.
  • Twitter:  Follow ADOT on Twitter  (@ArizonaDOT) for real-time highway conditions statewide.