A Santa Rosa man was identified as the victim of a fatal crash earlier this week on Highway 101 in Marin County, a county coroner’s official said.

Phaivanh Adidas Chanthalangsy, 45, was the lone occupant of a vehicle that crashed Sunday on the northbound lanes of Highway 101 in Novato, said Roger Fielding, a Marin County coroner’s investigator.

An autopsy and toxicology testing were scheduled on Friday, he said. The cause of death will be determined by the test results and a joint investigation by the CHP and coroner’s office.