U.S. Highway 101 was open to one-lane travel Tuesday night after another week of landslide activity blocked the road at Last Chance Grade. Crews have been working on the road since last week, when precipitation caused the hillside above the highway to crumble down, blocking both lanes for extended periods of time. As of Tuesday evening, crews warned motorists of possible 30-minute delays overnight, as well as three-hour delays scheduled between 9 a.m. and 6 p.m. to allow for removal and prevention work. âWe will continue constant monitoring of the slide and will provide updates here as we receive them,â Caltrans District 1 officials wrote in Facebook updates Tuesday. âThank you very much to our crews, our slide catchment and those motorists maintaining patience and attentiveness for keeping the slide area safe.â