PHOENIX – Work requiring closures and detours will start next week on the $10 million upgrade to the I-40/I-17 interchange that serves as the gateway to Flagstaff, according to the Arizona Department of Transportation.
Starting Monday, April 9, the I-17 northbound to I-40 westbound ramp will close for the duration of the project. Traffic heading north on I-17 looking to head west on I-40 should take the ramp for I-40 eastbound and then exit at the Butler Avenue traffic interchange. From there drivers can head back west on I-40.
One-direction closures on Beulah Boulevard are anticipated to occur at various times overnight between mid-April and May and again in October. Traffic should use the I-17 and the JW Powell Boulevard interchange to get around the closure both north- and southbound.
I-17 will also require one-direction closures overnight for bridge construction. Closures are anticipated to occur overnight on various dates in May. During northbound closures, traffic heading into Flagstaff will need to take the I-40 eastbound exit and then use the Butler Avenue interchange to come back and use the I-17 northbound exit to head into Flagstaff.
Traffic heading out of town during southbound closures should take I-40 westbound to the Flagstaff Ranch Road interchange and come back to use the I-40 east to I-17 south ramp.
Intermittent closures of the I-17 south to I-40 eastbound ramp will also be required. Those closures are anticipated to occur from mid- to late-June, late July and late October. Traffic looking to head east on I-40 leaving Flagstaff should take I-17 south to the JW Powell interchange and then head back north to I-40 eastbound.
This project includes replacing the I-40 bridge decks in each direction over Beulah Boulevard, immediately west of I-17, as well as the westbound bridge deck over I-17. The eastbound I-40 bridge over I-17 will get a new concrete surface.
The project will also increase the cross slope of the roadway over the renovated bridges, helping drain water off of the road surface. It also includes guardrail and paving work.
For more information, visit azdot.gov/FlagstaffTI.