Traffic Alerts - I-17 TI Reconstruction - Happy Valley and Pinnacle Peak

Update: Southbound I-17 closure planned this weekend between Jomax and Deer Valley roads

This alert updates the Sept. 18 traffic alert to cancel several previously-planned restrictions and closures this week.

Drivers who use Interstate 17 in north Phoenix should plan for heavy travel delays during the southbound freeway closure this weekend for paving work.

Closures and restrictions through Sept. 25

  • Southbound I-17 will be closed from Jomax to Deer Valley roads from 2 a.m. Saturday (Sept. 19) to 3 a.m.  Monday (Sept. 21) for pavement improvements.
    • Detour: Drivers can use southbound 19th Avenue between Jomax and Deer Valley roads or consider exiting in advance of the closure and using alternate routes via westbound State Route 74, eastbound Carefree Highway or southbound Loop 303. Complete

Interstate 17 from Pinnacle Peak to Happy Valley roads

  • North-and southbound I-17 will have overnight lane restrictions from 9 p.m. to 5 a.m. beginning Tuesday, Sept. 22 through the morning of Friday, Sept. 25.
  • Northbound I-17 will be restricted to two lanes on Tuesday (Sept. 22) and one lane Wednesday (Sept. 23) nights. Updated
  • Southbound I-17 will be restricted to one lane on Tuesday (Sept. 22). Updated

 Ramp closures

  • The northbound I-17 off-ramp at Happy Valley Road will be closed from 9 p.m. Tuesday (Sept. 22) to 5 a.m. Thursday (Sept. 24). New
  • The southbound I-17 on-ramp at Happy Valley Road will be closed from 9 p.m. Monday (Sept. 21) to 1 a.m. Tuesday (Sept. 22). Canceled
  • The southbound I-17 off-ramp at Pinnacle Peak Road will be closed from 11 p.m. Monday (Sept. 21) to 3 a.m. Tuesday (Sept. 22). Canceled
  • The southbound I-17 on-ramp at Pinnacle Peak will be closed from 3 a.m. to 5 a.m. Tuesday (Sept. 22). Canceled

Through October 2020

  • The northbound I-17 on-ramp and the southbound I-17 off-ramp at Happy Valley Road is closed.  
  • The southbound frontage road is closed between Jomax and Happy Valley roads, and the northbound frontage road is closed between Happy Valley Road and Agave. 
    • Detour: Traffic can use the Jomax Road interchange for I-17 access via 19th Avenue.  

Countdown to Happy Valley Road new interchange opening

ADOT anticipates an October opening of the new Diverging Diamond Interchange (DDI) at Happy Valley Road. View a simulation of how traffic will flow through the new interchange.

I-17 Happy Valley and Pinnacle Peak Construction Flyer

Drivers should slow down in the construction zone and use caution while restrictions are in place.

Stay Informed!

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 azdot.gov/Contact and then select Projects from the dropdown menu.

For real-time highway conditions statewide, follow ADOT on Twitter  (@ArizonaDOT), visit az511.gov or call 511, except while driving.