Heavy fog and a rain-slick road are blamed for several car crashes on Highway 32 in the Forest Ranch area.
The collisions happened Wednesday afternoon near La Castana Road.
Five vehicles were involved in three crashes.
One adult and one child went to the hospital with injuries.
A California Highway Patrol vehicle was not involved in a collision, but ended up in a ditch after the officer had to avoid hitting a pedestrian.
There was controlled traffic with drivers being led through in groups of 20 until the scene could be cleared.
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