The incident was reported around 12:47 a.m., March 25, on westbound State Route 4, just east of Lone Tree Way.
Brentwood, CA – A motorcyclist died after being hit by multiple vehicles early Wednesday morning in Brentwood, the California Highway Patrol reported.
The incident was reported around 12:47 a.m., March 25, on westbound State Route 4, just east of Lone Tree Way.
A motorcycle reportedly collided with a black SUV, leaving the rider and the bike down in the right lane. The SUV stopped about 50 feet ahead of the scene in the center divider.
Another car ran over the motorcyclist’s arm as they lay in the traffic lanes. The driver of a big rig also called 911, reporting that they had run over the rider.
Emergency personnel responded to the scene and blocked all the westbound lanes of the highway.
The motorcyclist died from their injuries at the scene, prompting a coroner representative to respond.
The SUV, a black sedan, and the motorcycle were towed away from the scene.
CHP officers are investigating the Brentwood collision.
According to 2025 SafeTREC and OTS data, California recorded 583 motorcyclist deaths in 2023, marking a 10.2% decrease from the previous year. Despite this improvement, riders remain significantly overrepresented in traffic violence, accounting for 14.4% of all traffic fatalities while representing only 3% of registered vehicles. Serious injuries also remain high, with Los Angeles (754) and San Diego (317) counties recording the highest volumes. Nationally, riders are estimated to be 28 times more likely to die in a crash than passenger car occupants per mile traveled.
The primary crash factors identified in 2026 reports are unsafe speed (28.2%), improper turning (19.8%), and automobile right-of-way violations (19.3%). Broadside collisions are the most common fatal crash type, frequently occurring at urban intersections on weekend afternoons.
Speak with a Professional Motorcycle Accident Lawyer
If you are a family member of the victim of this crash, a professional motorcycle accident lawyer can help you answer all the legal questions about the crash and help you file a wrongful death claim. Visit our motorcycle accident lawyer page for more information.