SAN MATEO COUNTY - An Alameda man was killed Friday night on state Highway 1 near Pescadero when he was ejected from his car and then struck by another vehicle, according to the California Highway Patrol.

The driver, identified by the San Mateo County Coroner as Peter Edward Keenan, 43, was apparently driving south on Highway 1 just north of Pescadero Road when he lost control of his Chrysler, CHP Officer Art Montiel said.

The vehicle swerved off the roadway and Keenan appears to have tried to regain control, but the vehicle traveled across the northbound lane and collided with an embankment and may have overturned.

Keenan was ejected, and lay in the roadway for an undetermined amount of time before he was struck by a northbound vehicle shortly before 11:30 p.m. He suffered fatal injuries and was declared dead at the scene by paramedics.

A passenger in the vehicle, identified as a 44-year-old Castro Valley woman, was taken to Stanford University Hospital with major injuries.

The collision closed Highway 1 in both directions for around three hours.

The accident remains under investigation and it is unknown if drugs or alcohol were a factor.

Anyone who witnessed the collision should call (650) 369-6261 x373.