The workers will be west of Malibu, dislodging boulders that could cause rockslides, a Caltrans spokeswoman said.
Nine miles of the winding oceanfront road have been closed because of the recent rain, which caused mud and debris to tumble onto the pavement. To stop more debris from falling onto the road, Caltrans workers are using poles, ropes and cherrypicker trucks to remove some of the rocks on the cliffs that line the highway between County Line Beach and Point Mugu, just west of the L.A.-Ventura County line, said Caltrans spokeswoman Kelly Markham.
"They'll be working through Sunday," she said.
The coast highway remained closed from Yerba Buena Road, at the county line, to Las Posas Road. Drivers heading up the coast from Malibu are being detoured to Kanan-Dume Road 13 miles north to the Ventura (101) Freeway.
Another possible detour, state Route 23, is very steep and windy and is not recommended for regular traffic, CHP officers at the roadblock have advised drivers.