A pickup truck overturned on the freeway and rolled down an embankment in University City, the California Highway Patrol (CHP) confirmed.
The incident occurred at 5:06 p.m. on the eastbound State Route 52 near Interstate 805.
The pickup truck drove from the westbound side into the eastbound side of the State Route 52, CHP officials said.
The crash did not impact traffic.
A woman suffered an injury to the head and was bleeding, according to CHP.
No other information was available.