Early information identified a Toyota Tacoma and another vehicle described as a Honda or Mercedes-type sedan, with additional vehicles becoming involved as the incident unfolded
Discovery Bay, CA – At least one person was severely injured following a multi-vehicle collision on State Route 4 in Discovery Bay late Tuesday afternoon, according to the California Highway Patrol (CHP).
The crash occurred on SR-4 at the Old River Bridge at approximately 4:39 p.m. on January 27, 2026, blocking both lanes of the roadway during the initial response.
According to CHP incident logs, the crash was first reported as a head-on traffic collision and ultimately involved four vehicles.
Early information identified a Toyota Tacoma and another vehicle described as a Honda or Mercedes-type sedan, with additional vehicles becoming involved as the incident unfolded.
All lanes of SR-4 were blocked as a result of the collision.
At least one person was transported from the scene with serious injuries.
CHP logs did not indicate any arrests related to the multi-vehicle crash. The cause of the crash has not yet been determined, and investigators have not released details on contributing factors at this stage.
CHP officers responded to the scene and coordinated traffic control and roadway clearance while managing the investigation.
Multiple resources were requested to assist with clearing disabled vehicles from the bridge.
The collision caused significant traffic delays in the Discovery Bay area, with both directions of SR-4 impacted for more than an hour.
CHP logs indicate the roadway was reopened by approximately 6:13 p.m.
The multi-vehicle collision remains under investigation by the California Highway Patrol as authorities work to determine the circumstances leading up to the collision.
California Crash Safety Statistics
Traffic collisions remain a major safety concern across California. According to the California Office of Traffic Safety (OTS), the state recorded 4,061 traffic fatalities in 2023, representing a decrease of about 11% from the previous year. Despite the decline, California’s mileage death rate remained at 1.26 fatalities per 100 million vehicle miles traveled, highlighting the continued risks on state highways. Nationally, the National Highway Traffic Safety Administration (NHTSA) estimates that approximately 39,345 people were killed in traffic crashes in 2024, marking an improvement but still well above pre-pandemic levels.
If you or a loved one has been injured in a multi-vehicle accident, it’s important to speak with an experienced personal injury attorney as soon as possible. An accident attorney will help protect your rights, guide you through the claims process, and ensure you pursue the compensation you deserve. Contact a trusted car accident lawyer today to discuss your legal options.