A driver headed north on Highway 101 crashed south of Petaluma late Monday night and was found dead in his car, reported the CHP.
Other drivers called 911 at 11:38 p.m. saying a silver sedan had run off of the highway near the Redwood Sanitary Landfill.
Officers found the Ford Fiesta in a field, with little collision damage, said the CHP.
A man behind the wheel was slumped over in his seat, unresponsive.
Officers had to break a window to get to the man. Attempts to revive him failed.