Traffic Alerts - I-17 Southbound: Coconino County Line - McConnell Bridge

Plan for lane restrictions on southbound I-17 south of Flagstaff as major paving project begins June 14

The Arizona Department of Transportation is advising motorists to plan for lane restrictions on southbound Interstate 17 south of Flagstaff as an extensive pavement rehabilitation project begins.

Starting on Tuesday, June 14, and continuing through the end of July, the following around-the-clock restrictions will be in place seven days a week:

  • Southbound I-17 will be reduced to one lane at three locations between Kachina Boulevard and south of Munds Park (mileposts 321, 331 and 333).
  • A vehicle width limit of 16 feet will be in place.
  • The speed limit will be reduced to 55 mph.
  • Drivers should slow down, be prepared to stop and proceed through the work zones with caution.

The project, which is expected to be completed in summer 2024, will rehabilitate and repave 29 miles of southbound I-17 from the McConnell Drive Bridge in Flagstaff to the Coconino County line. 

The primary purpose of the project is to perform much-needed repairs and upgrades to the road surface on this heavily traveled stretch of I-17. In addition to the travel lanes and shoulders, several on- and off-ramps and nine bridges within the project area will be repaired and repaved. Similar work was already performed on the northbound side of the roadway.

Nearby travel restrictions: Portions of State Route 89A between Flagstaff and Sedona are reduced to one lane only of alternating north- and southbound travel due to the SR 89A Oak Creek Improvements project currently underway. As a result, drivers may experience additional delays on SR 89A, if they should choose to use that roadway as an alternate route.

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, Need to know where a milepost is? Click on the "Mile Markers" icon on the map at Follow ADOT on Twitter (@ArizonaDOT) or call 511, except while driving.