Happy Valley Road, ramps closed at I-17 this weekend to prepare for new interchange opening Sunday

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Happy Valley Road, ramps closed at I-17 this weekend to prepare for new interchange opening Sunday

The new Diverging Diamond Interchange (DDI) at Happy Valley Road is scheduled to open Sunday, Oct. 11 at 5 p.m. To prepare for the interchange opening and allow crews to complete striping, install new signs and activate the new signals, Happy Valley Road approaching I-17 and all interchange ramps will be closed beginning Friday night until Sunday afternoon.  Please note while traffic will flow through the interchange in the new Diverging Diamond travel patterns, lane restrictions will be needed on Happy Valley Road and the off-ramps until all work is completed later this fall.

View a simulation of how traffic will flow through the new interchange and learn more on our website.

Drivers who use Interstate 17 in north Phoenix should slow down in the construction zone and use caution while the following restrictions are in place.

Closures and restrictions through Oct. 11

Happy Valley Road at Interstate 17

East- and westbound Happy Valley Road will be closed between 29th and 23rd avenues from 9 p.m. Friday (Oct. 9) until 5 p.m. Sunday (Oct. 11). 

  • Detour: Drivers can use 43rd or 19th avenues to Pinnacle Peak Road as an alternate route.

Ramp Closures:

All Interstate 17 on- and off-ramps at Happy Valley Road closed from 9 p.m. Friday to 5 p.m. Sunday (Oct. 11) for lane striping and other work needed to open the new interchange.

  • Detour: Consider alternate routes including Deer Valley, Pinnacle Peak or Jomax roads. Access to local businesses along Happy Valley Road will be maintained.

Ongoing closures

The following closures are in place until 5 p.m. on Oct. 11:

  • 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.  
  • The northbound frontage road is closed from Charlotte Drive to the I-17 Happy Valley Road off-ramp from 9 p.m. Sunday (Sept. 27) until 5 a.m. Monday (Nov. 2).  The northbound I-17 Happy Valley Road off-ramp will remain open.
    • Detour: Traffic can use Charlotte Drive west to 23rd Avenue to access Happy Valley Road.