Drivers can expect one-way alternating traffic controlled by a signal on US 101 in the Purdy Canyon vicinity through out the duration of the project. Excavation work will completely close the highway for 25 nights from 7 p.m. to 6 a.m. Sundays to Thursdays. A 22-mile signed detour will be in place to direct northbound and southbound traffic along State Route 106 back to Hwy 101.