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SAN JOSE, Santa Clara County, Calif., Sept. 22, 2026 — Three vehicles collided late on Sunday night, September 20, on southbound US-101 near the Oakland Road off-ramp in San Jose. The crash left vehicles blocking travel lanes and prompted a call for medical aid.
The California Highway Patrol's traffic log shows the collision was reported around 11:31 p.m., involving a Toyota Prius, a Nissan sedan and a Toyota Camry. Responding units noted moderate front-end damage to the Camry, minor front and rear damage to the Nissan, and moderate rear damage to the Prius, the report said.
Fire crews and paramedics responded to the scene, and the log indicates a request for ambulance service, coded as a possible injury response. The exact number of people hurt has not been released. A caller reportedly told dispatchers a driver was standing in the middle of freeway lanes at one point, according to officials, though further details on that report were not available.
Tow trucks were called to clear the vehicles, and the report noted that the Camry was later held as evidence, suggesting the crash remains under review. The CHP has not released a cause. The incident temporarily blocked the number three lane and the Oakland Road off-ramp, per the log.
No additional information on citations or contributing factors had been released as of Monday.
We wish the injured a complete and speedy recovery.
What the Numbers Show About Multi-Vehicle Freeway Crashes
According to the Insurance Institute for Highway Safety, 17,008 motor-vehicle crash deaths occurred outside passenger vehicles in crashes involving passenger vehicles in 2023. That figure includes pedestrians, cyclists and occupants of other vehicle types caught up in crashes that began with passenger cars or SUVs, a reminder that collisions on busy highways usually extend beyond the vehicles first involved.
Multi-vehicle pile-ups on freeways tend to start small, frequently as a single rear-end or lane-change incident, before following vehicles are drawn in during the seconds it takes traffic to react. Speed differences between lanes, following distance, and driver attention all factor into whether a first impact stays contained or spreads to a third or fourth vehicle.
Federal crash data consistently shows that chain-reaction collisions cluster in high-volume corridors and during periods of heavy merging, such as near freeway on-ramps and off-ramps. That pattern holds across most major metro areas, not just any one city or route.
Frequently Asked Questions
Are secondary crashes common after an initial wreck?
Yes. Once one crash blocks a lane, following traffic usually has little time to react, and secondary collisions are a well-documented risk, especially on freeways with heavy volume.
What makes multi-vehicle crashes hard to investigate?
Investigators have to determine the sequence of impacts, which vehicle struck which, and in what order, sometimes relying on damage patterns, witness accounts, and any available video.
What typically causes chain-reaction pile-ups?
Common factors include sudden braking, lane changes, tailgating, and reduced visibility, all of which can turn one collision into several within seconds.
What to Do After a Multi-Vehicle Crash in San Jose, CA
If you're involved in a multi-vehicle crash, move to a safe location if possible and turn on hazard lights to warn oncoming traffic. Call 911 even if injuries seem minor, since some symptoms take hours to appear. Exchange information with other drivers and, if you're able, take photos of vehicle positions and damage before cars are towed. Seeking a medical evaluation soon after the crash, even without obvious injury, helps document any harm and supports a clear record for insurance or investigative purposes.
