Caltrans on Monday will begin a culvert pipe replacement project to repair the road crossing on state Highway 1 just outside the town of Marshall in Marin County.
The project is expected to last two weeks, and work will be done during the hours of 6 a.m. to 6 p.m. on Monday through Friday.
The two lanes of state Highway 1 will be reduced to one lane.
Crews will be onsite to flag motorists through the work zone at five-minute intervals in northbound and southbound directions.
Motorists are asked to reduce their speed and be prepared to stop when traveling through this area during the project.