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BAY POINT, Contra Costa County, Calif., Oct. 29, 2026 — A big rig and a van collided early Thursday morning, October 29, on eastbound State Route 4 at Bailey Road South in Bay Point, according to the California Highway Patrol. At least one person was reported to need medical attention at the scene.
The crash was reported just before 3:45 a.m. near Bailey Road South, with the big rig coming to rest on the right shoulder and the van blocking a lane of traffic. Witnesses reported seeing white smoke coming from the van shortly after the collision, though no fire was confirmed in the dispatch record.
An ambulance was requested for injuries at the scene, and medical personnel responded. Four lanes of eastbound SR-4 were blocked for a time while crews worked the scene, backing up traffic in the area. A tow truck was later called to remove the vehicles once the investigation allowed.
The CHP has not released the extent of the injuries reported or said what led to the collision. The incident remains under investigation by the California Highway Patrol.
We hope those who were hurt recover fully and quickly.
Intersection Safety in California
The truck crash was reported at State Route 4 and Bailey Road in Bay Point. Readers following crash news in Contra Costa County can find more about intersections across the state on our guide to California intersections.
Frequently Asked Questions
What are a truck's blind spots, and why do they matter?
Large trucks have wide blind spots along both sides, directly behind the trailer, and close in front of the cab. Drivers who linger in these areas may not be visible to the truck driver, raising the risk of a collision during lane changes or turns.
What is an underride crash?
An underride crash happens when a smaller vehicle slides partly or fully beneath a truck's trailer during a collision, usually in a rear-end or side-impact situation. These crashes can cause serious damage because the trailer bed sits higher than most passenger vehicle hoods.
What usually causes large-truck accidents?
Common factors include driver fatigue, following too closely, mechanical failure, poor visibility, and sudden lane changes near a truck's blind spot. Investigators typically look at all of these factors, along with weather and road conditions, when reviewing a crash.
How can drivers share the road safely with trucks?
Giving trucks extra following distance, avoiding lingering beside or behind a trailer, and signaling early before changing lanes near one can help prevent sudden, close encounters on the highway.
