FLAGSTAFF, Ariz. (AP) - The Arizona Department of Transportation says heavy holiday traffic is causing delays on southbound Interstate 17 near Payson.

The delays are around Camp Verde between State Route 260 and Cordes Junction and near Black Canyon City.

RELATED: How to avoid traffic delays on I-17

Drivers hitting the road Labor Day should plan for extra travel time and make sure to pack enough water and an emergency kit.

Around 2:30 p.m., the Arizona Department of Transportation said there was a 15-mile slowdown along I-17 southbound through Cordes Junction.