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MOUNTAIN VIEW, Santa Clara County, Calif., Oct. 3, 2026 — A four-vehicle crash left at least one person with minor injuries on Friday afternoon, October 2, on northbound U.S. 101 near Shoreline Boulevard, the California Highway Patrol said. The wreck blocked lanes of traffic during the evening commute.
The crash was first reported as a two-vehicle collision in the number 1 lane shortly before 3:45 p.m. A second vehicle was soon reported involved in the number 2 lane, and the incident grew to involve four vehicles total. One caller reported being in a gray Honda and said she was not hurt.
The CHP initially classified the collision as causing no injuries, then as an unknown-injury crash, before confirming at least one minor injury. Damage was reported on a Honda Accord, described as major front-end damage, and on a Lexus SUV, with moderate damage to the rear and front ends.
Units reported the collision blocked the right-hand express lane and the number 1 lane for a time before the lanes reopened. Tow trucks were called to the scene to remove the disabled vehicles, and a Freeway Service Patrol unit that had responded closed out its portion of the call by late afternoon.
The CHP has not released further details on what led to the crash. The incident remains under investigation.
We hope those who were hurt recover fully and quickly.
What the Numbers Show About Multi-Vehicle Freeway Crashes
According to the National Highway Traffic Safety Administration, 28,595 large-truck occupants were injured in multi-vehicle crashes involving large trucks in 2023. That figure reflects just one slice of a much larger pattern: multi-vehicle collisions, whether they involve trucks, SUVs, or sedans, tend to produce more injuries per crash than single-vehicle wrecks because more people and more points of impact are involved.
Chain-reaction crashes on busy freeways usually start small, a rear-end bump or a lane-change misjudgment, before a following vehicle fails to stop in time and adds a third or fourth car to the pileup. Traffic volume and following distance matter more than speed alone in these pileups; even at moderate speeds, a short following gap gives drivers little time to react once brake lights appear ahead.
Investigators typically piece together multi-vehicle crashes using a mix of driver and witness statements, vehicle damage patterns, and roadway camera footage where it exists. The order in which vehicles struck each other, and which impact caused which injury, can take time to sort out, which is why early classifications (as seen in this case) sometimes change as more information comes in.
Frequently Asked Questions
What should I do if I'm stopped near a crash on the highway?
Move your vehicle out of travel lanes if it's drivable and safe to do so, turn on hazard lights, and stay inside the vehicle or behind a guardrail if you must exit. Watch for approaching traffic, which may not see the stopped cars in time.
How does fog or low visibility contribute to pile-ups?
Reduced visibility shortens the distance drivers have to spot slowed or stopped traffic ahead, which can turn a single fender-bender into a multi-car chain reaction. Drivers should slow down and increase following distance well before entering a foggy or low-visibility stretch.
Why does following distance matter so much on freeways?
A longer gap gives a driver more time to brake smoothly instead of slamming on the brakes, which reduces the chance of being struck from behind or rear-ending the car ahead. At highway speeds, even a few extra car lengths can make the difference.
Are secondary crashes common after an initial wreck?
Yes. Once traffic backs up behind a crash, approaching drivers who don't slow down in time can strike stopped vehicles or each other, adding to the original incident. This is part of why agencies move to clear lanes and block traffic to approaching cars as quickly as possible.
What to Do After a Multi-Vehicle Crash in Mountain View, CA
If you're involved in a multi-vehicle crash, check yourself and any passengers for injuries before doing anything else, and call 911 if anyone is hurt or vehicles are blocking traffic. Even if you feel fine, some injuries from a collision don't show symptoms right away, so a medical check within a day or two is a good idea.
Exchange information with other drivers if it's safe to do so, and take photos of vehicle positions and damage before cars are moved or towed. Request a copy of the CHP or police report once it's filed, since it can take days to be finalized, and keep records of any medical visits or repair estimates that follow.
