In Sonoma County:
On Highway 101, from Steele Lane to Windsor River Road, two lanes in each direction will be closed from Monday night/Wednesday morning through Tuesday night/Wednesday morning, 10 p.m. to 5 a.m.
The on ramp from Santa Rosa Avenue to southbound Highway 101 will be closed 24/7 until further notice.
In Marin County:
On Highway 101, the southbound connector ramp to eastbound 580 will be reduced to one lane starting on the morning of April 7, and continuing for seven months.
On Interstate 580, the westbound connector to northbound U.S. 101 will be reduced to one lane starting on the morning of April 13, and continuing for approximately seven months.
