One lane in each direction of Pacific Coast Highway will be closed this weekend for the Nautica Malibu Triathlon. The right lane of the highway will be closed in both directions between Heathercliff Road and Deer Creek Road from 5 a.m. to 1 p.m. on Saturday and Sunday, according to a release from Caltrans. In the release, Caltrans encourages motorists to use caution when driving near the lane closure areas.