Sepulveda Boulevard begins from the south at SR 91(Artesisa Boulevard) in Manhattan Beach as a continuation of SR 1. In 2018, the city of El Segundo renamed their portion of SR 1 to Pacific Coast Highway from Rosecrans Avenue to Imperial Highway where SR 1 continues again as Sepulveda Boulevard. Past Imperial Highway, it crosses the western terminus of the Century Freeway (I-105), going through the LAX Airport Tunnel to pass under its runways. The road then passes through an interchange with Century Boulevard, which provides access to LAX's terminals to the west and the San Diego Freeway (I-405) to the east.