A head-on collision on Highway 116 near Stony Point Road Sunday night involved a suspected drunken driver, reported the CHP Monday.
A Novato driver in a Toyota Camry crossed over double yellow lines at about 9:15 p.m. and struck another Toyota Camry.
The woman in the second sedan went by ambulance to Santa Rosa Memorial Hospital with possible moderate injuries, reported the CHP.
CHP officers arrested Rene Espinoza, 24, on suspicion of drunken driving.
About 30 minutes later, a suspected drunken driving crash occurred on Adobe Road near Petaluma.