The Arizona Department of Transportation is advising motorists and travelers of around-the-clock lane restrictions on southbound Interstate 17 south of Flagstaff. Restrictions will be in place as crews continue on an extensive 29-mile pavement upgrade project. Southbound I-17 will be reduced to one lane at three locations between Kelly Canyon Road and Stoneman Lake Road, a 13-foot vehicle width limit will be in place, and the speed limit will be reduced to 55-miles-per-hour. The southbound on and off-ramps at Newman Park Road will also be closed. Restrictions will be in place through October. The project is expected to be completed by the fall of 2024.