A stretch of Topanga Canyon Boulevard between Malibu and Topanga will be closed overnights this week, beginning Monday, so crews can perform repair work on storm-eroded embankments.
The street will be closed between Pacific Coast Highway and Grand View Drive from 10 p.m. to 5 a.m. each night, continuing for four nights.
Caltrans officials said multiple rock and debris slides occurred in the canyon during this year's storms, necessitating work to stabilize the hillside.
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Caltrans urged motorists to use the Ventura (101) Freeway, Las Virgenes Road and Malibu Canyon Road as alternate routes, but drivers were being warned to expect delays.