A three-car collision involving an overturned car snarled traffic on Highway 12 between Santa Rosa and Sebastopol, closing one of the regular lanes to traffic on Wednesday afternoon, the CHP said.

The 3:20 p.m. crash at the Llano Road intersection closed the westbound lane to traffic, though a left-turn lane was being used for through traffic, the CHP said.

Emergency dispatchers said a patient who was expected to be sent to the hospital first had to be cut from the wreckage of one car before the road could be cleared.