A short section of Pinnacle Peak Road east of the Interstate 17 interchange in north Phoenix will be closed for just over three weeks starting early Tuesday, Feb. 19, while crews remove and replace a concrete drainage culvert. The road is scheduled to reopen March 14.

The work is part of the Arizona Department of Transportation’s ongoing project to reconstruct the I-17 interchanges at both Pinnacle Peak and Happy Valley roads.

Drivers who normally would use Pinnacle Peak Road in either direction just east of the I-17 interchange should plan on using alternate routes, including Deer Valley Road or Happy Valley Road.

All of the I-17 on- and off-ramps at Pinnacle Peak Road will remain open to traffic, as will the northbound I-17 frontage road in the area. Northbound I-17 drivers exiting at Pinnacle Peak Road will be limited to either left turns to travel westbound or continuing north onto I-17 or along the frontage road to Happy Valley Road.

Drivers using the eastbound Pinnacle Peak Road bridge over I-17 will be required to make left turns to travel northbound, either onto northbound I-17 or along the frontage road to Happy Valley Road.

ADOT has worked with the city of Phoenix to develop local detour routes. Businesses and schools in the area south of Pinnacle Peak Road and east of I-17 will remain accessible via 19th Avenue.

The closure of Pinnacle Peak Road east of I-17 is scheduled to start just after midnight Feb. 19 and end in the early morning hours of Thursday, March 14.

The Pinnacle Peak drainage culvert replacement is part of ADOT’s $50 million I-17 project that will reconstruct the interchanges at Happy Valley and Pinnacle Peak roads. Work started in November 2018 and is scheduled for completion by fall 2020.

The project is funded through the Maricopa Association of Governments’ Regional Transportation Plan approved by Maricopa County voters in 2004. Funding sources include a regional half-cent sales tax for transportation projects as well as the Phoenix region’s share of federal highway funds.