Interstate 17 Traffic Interchange Reconstruction – Happy Valley Road and Pinnacle Peak Road

The Arizona Department of Transportation and the Federal Highway Administration have completed the reconstruction of the traffic interchanges on Interstate 17 at Happy Valley and Pinnacle Peak roads in north Phoenix. The project also included adding an additional travel lane on I-17 and replacing a box culvert on Pinnacle Peak Road on the east side of I-17.

The purpose of the project is to improve safety and traffic flow as population growth and development in this area continues.

Construction of both interchanges is now substantially complete and the interchanges opened to traffic in November 2020. Some minor construction activities, including landscape establishment, are still occurring through spring 2021. These activities are primarily taking place outside the roadway. 

Project Schedule

  • Construction began in November 2018. 
  • The interchanges were opened to traffic in November 2020. All work at the interchanges is scheduled to be complete in spring 2021.

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