PHOENIX -- Several crashes in north Phoenix are causing delays for Labor Day weekend travelers on a major interstate.
The Arizona Department of Transportation said there have been heavy traffic backups Saturday afternoon on Interstate 17 from north Phoenix up to Black Canyon City.
According to ADOT, a crash at the exit for State Route 74 and Carefree Highway caused cars to slow for 18 miles. Traffic had to be restricted to one lane in Rock Springs.
Crews are also working to clear a crash at Anthem Way.
ADOT said more lane closures are possible.
Motorists heading north can try alternate routes such as State Route 87 through Payson or State Route 89 through Prescott.