Caltrans is planning these construction projects involving lane closures this week in Sonoma County:

–Commerce Boulevard under Highway 101 in Rohnert Park will be closed 8 p.m. Thursday to 5 a.m. Friday and 8 p.m. Friday to 8 a.m. Saturday. Crews are demolishing part of the old overpass there.

–In Cotati, the on/off ramps of 101 at Highway 116 will be closed 8 p.m. to 5 a.m. Monday through Friday.

–On Highway 128, one-way traffic control will be in effect 7 a.m. to 3 p.m. Tuesday through Friday at Maacama and Redwood bridges.