Caltrans plans the following lane closures in Sonoma, Marin and Mendocino counties:

SONOMA COUNTY:

–Highway 101, from Steele Lane to Windsor River Road, northbound and southbound, various locations, one lane will be closed at 7 p.m. Monday to Friday and a second lane at 10 p.m., with all lanes reopened by 5 a.m., except at 7 a.m. Saturday. The good news here is that the work should be finished within a couple of weeks, Caltrans has said.

–Commerce Boulevard under Highway 101 in Rohnert Park, closed 8 p.m. to 5 a.m. Wednesday, Thursday and Friday.

–Highway 101, from Rohnert Park Expressway south to Pepper Road, various lanes at various locations, 11 p.m. to 5 a.m. Monday to Friday.

–Highway 116, from Adobe Road to County Dump Road, one-way traffic control 7 p.m. to 5 a.m. Monday through Friday. Motorists have reported traffic backups here are awful.

MARIN COUNTY

–Highway 1, from Point Reyes area to Tomales, one-way traffic control at various locations from 7 a.m. to 5 p.m. Monday to Friday.

MENDOCINO COUNTY:

–Highway 101 in Ukiah, traffic will be down to one lane in each direction from 8 p.m. Sunday to 3 p.m. Friday because of pavement repair project. Ramps at Talmage Road, Gobbi Street and Perkins Street will be intermittently closed.

–Highway 101, from just north of Sonoma-Mendocino County line and extending about five miles north, a guardrail repair project will limit traffic to one lane in both directions from 7 p.m. to 7 a.m. Sunday through Friday morning.

–Highway 101, from El Roble Road north about 24 miles to nearly Haehl overcrossing for guardrail repair project, with one-lane traffic restrictions at various locations from 6 a.m. to 7 p.m. Monday to Friday.

–Highway 101 from Steel Lane to just south of Rattlesnake Summit, pavement repairs will continue from 7 a.m. to 5 p.m. Monday to Friday, with traffic restrictions in both directions.