RICHMOND -- A 32-year-old Richmond man was killed Friday morning when he was struck by several vehicles as he was walking across Interstate 80 after his car collided with a median wall, the California Highway Patrol said.

The Contra Costa County coroner's office identified the dead man as Nathaniel Robinson Sr.

Robinson was killed about 12:26 a.m. Friday in the westbound lanes of I-80 near Solano Avenue.

Robinson's Buick had collided with the center median wall and for unknown reasons he got out of the car and was trying to cross the freeway from the number one lane to the right shoulder when he was hit by several vehicles, the CHP said.

He was found in the number four lane and pronounced dead at the scene.

CHP Officer Daniel Hill said two of the drivers who hit Robinson remained at the scene and gave statements to officers but others continued on.

All westbound lanes were temporarily closed and the CHP issued a Sigalert about 12:55 a.m. while officers conducted their investigation

Two lanes of traffic were reopened about 1:20 a.m. and all lanes were reopened about 2:20 a.m.

The CHP is still seeking witnesses. Anyone with information may call the CHP at 510-450-3821 or the CHP's bib-emergency public access number at 1-800-835-5247.