Three vehicles were involved in a fender-bender crash about 8:25 a.m. Thursday near San Martin Avenue on northbound U.S. 101, slowing traffic about a half-mile.
At 8:40 a.m. all northbound lanes were blocked, and police and firefighters were on scene clearing the freeway. On the southbound side, traffic slows as drivers brake to observe the scene.
No injuries have been reported, according to the California Highway Patrol.
A white Mercedes sedan, older model green van and black car are involved in the collision, according to the CHP.