As was done for the first time on Memorial Day weekend, ADOT will lower the speed limit on the first and last days of the long 4th of July holiday weekend, in an effort to reduce crashes on the winding stretch into the mountains north of Phoenix.
Top speeds will be reduced by 10 mph Friday, June 30, on northbound I-17 between New River and Sunset Point Rest Area. Then on Tuesday, July 4, the same stretch will have speed reduced 10 mph in the southbound lanes.
Temporary signs will advise drivers of the lower speed limits., and temporary electronic signs will let drivers know their speeds.
The speed restrictions could not prevent what happened the Friday of Memorial Day Weekend, when a vehicle fire near Sunset Point caused a 25-mile backup, all the way to Anthem.
The curvy section of the interstate, which is prone to crashes, will eventually get more lanes, after a decision earlier this month to fund a project that will create three lanes in each direction north of Anthem Way and reversible lanes in 8-mile grade north of Black Canyon City.
Separately, ADOT will not schedule any construction closures along state highways from Friday through late Tuesday evening, the agency said in a statement today.