Man in hospital after crash in Fortuna

The following is from the California Highway Patrol: 

While travelling on US-101 southbound, party-1 lost control of their vehicle and struck the guardrail on the west shoulder of US-101 at Main St. Fortuna.  The vehicle then travelled east, striking the concrete center divider wall over Main St., and party-1 was ejected from the vehicle. 
Fortuna Fire, City Ambulance, and the CHP responded.  Party-1 suffered major injuries and was transported to Redwood Memorial Hospital.
Party-1 was alone in the vehicle, and no other vehicles were involved.  The collision is still under investigation.