A Toyota Tundra being driven north on U.S. Highway 101 near Wilson Lane crossed over into oncoming traffic and struck the back end of a trailer hauled by a semi-truck around 12:25 p.m. on Tuesday.
Debris from the trailer then struck another car.
The collision caused minor injuries, the California Highway Patrol stated.
It did not shut down any lanes of the highway.
It is unclear what caused Timothy Hennessey, 18, of Klamath Falls, Ore., to cross his truck into oncoming traffic and hit the semi-truck driven by Dennis Moline, 61, of Grants Pass, Ore.