BYRON (CBS SF) — A collision between a big rig and another vehicle just south of Byron Thursday morning caused the big rig to overturn, killing the driver, the California Highway Patrol reported.

The East Contra Costa Fire Protection District said the crash happened at around 6:25 a.m. along the Byron Highway near Holey Road just east of the Byron Airport.

CHP investigators determined the big rig had been traveling southbound on the Byron Highway when it crossed over the double yellow line and into the northbound lane, side-swiping a pickup truck that was headed northbound.

After the collision, the semi driver veered back across the southbound lane and lost control, flipping over into a dirt field and landing upside down, spilling rolls of aluminum and leaking fuel, according to the CHP.

The big rig’s cab was crushed with the unidentified male driver inside and he was pronounced dead at the scene, the CHP said. The pickup truck driver was not injured.
It was not immediately known if alcohol or drugs were involved. Anyone who saw the crash or the events leading up to it was urged to Contra Costa CHP in Martinez at (925) 646-4980.