I-19 northbound

The Arizona Department of Transportation is starting a year-long project on Thursday to repave about 19 miles of Interstate 19, beginning near Tubac.

ADOT plans to resurface the road with rubberized asphalt, including a segment in Green Valley and Sahuarita. The roughly eight-mile segment runs between Pima Mine and Duval Mine roads.

The $12.1 million resurfacing project includes replacement of the bridge deck at Sahuarita Road.

Another $17.2 million project will resurface an 11-mile segment between Tubac and Arivaca Road. The resurfacing begins Thursday at the U.S. Border Patrol checkpoint north of Tubac.

ADOT also plans to narrow southbound I-19 at the Border Patrol's station for two months. ADOT expects travel delays during work, which it expects completed in early 2022.