Los Angeles City Fire Department personnel reported three patients at the scene. The California Highway Patrol shut down all lanes as a result, causing a major back-up on the roadway.
Authorities said a pedestrian was struck by two vehicles and killed Saturday near Huntington State Beach.
The California Highway Patrol Friday evening began escorting drivers over the Grapevine section of Interstate 5.
All lanes of La Cienega Boulevard were reopened early Wednesday morning after the roadway buckled, forcing transportation officials to shut down the heavily traveled street.