Available 
GILROY, Santa Clara County, Calif., Sept. 28, 2026 — Five vehicles collided Sunday afternoon, September 27, on eastbound State Route 152 at Dinosaur Point near Gilroy, according to the California Highway Patrol. At least one person reportedly required ambulance transport.
The California Highway Patrol said a caller reported the five-vehicle wreck shortly before 6 p.m., with the crash blocking part of eastbound SR-152 and creating a traffic hazard for other drivers approaching the scene. Dispatch logs show a request for medical aid, indicating at least one injury among those involved.
The Santa Clara County Sheriff's Office was also notified of the medical response, per CHP dispatch notes.
The cause of the crash remains under review. We wish those injured a speedy recovery.
What Actually Cuts Down on Chain-Reaction Highway Crashes
Multi-vehicle pileups like the one reported on SR-152 often start with a single sudden stop. When traffic bunches up on a two-lane highway and one driver brakes hard, following vehicles have only a second or two to react. On rural stretches where speeds stay high between towns, that gap closes fast, and a small slowdown can turn into a five- or six-car chain reaction before anyone has time to steer around it.
Road design plays a real role in preventing this. Wider shoulders give drivers room to move over instead of rear-ending the car ahead. Rumble strips and better lane striping warn distracted drivers before they drift into slowing traffic. Signal timing matters less on open highway segments like Dinosaur Point, but consistent speed limits and clear sightlines around curves help drivers anticipate slowdowns instead of meeting them by surprise.
Driver spacing does the rest. Leaving three or four seconds of following distance, rather than one or two, gives a driver enough time to brake smoothly instead of stopping short. According to the National Highway Traffic Safety Administration, 2,979 passenger-car occupants were killed in two-vehicle crashes involving a passenger car and a light truck in 2023, a reminder that the size mismatch between vehicles on the road adds risk even before a chain-reaction crash begins.
Frequently Asked Questions
What makes multi-vehicle crashes hard to investigate?
Investigators often have to sort out the order vehicles collided, since a rear driver may have hit a car that was already stopped from an earlier impact. Conflicting witness accounts and limited camera coverage on rural highways can also slow the process.
What usually causes a chain-reaction pileup?
Most start with one vehicle stopping or slowing suddenly, whether from another crash, road debris, or heavy traffic, followed by drivers behind who don't have enough following distance to stop safely.
How can drivers avoid getting caught in one?
Keeping extra distance from the vehicle ahead, watching brake lights several cars up, and easing off the gas early when traffic bunches can buy the extra second needed to stop safely instead of colliding.
What to Do After a Multi-Vehicle Crash in Gilroy, CA
If you're involved in a multi-vehicle crash, try to move to a safe spot away from traffic if your vehicle is drivable, and turn on hazard lights to warn other drivers. Check yourself and passengers for injuries before checking on others nearby.
Call 911 to report the crash and request medical help if anyone is hurt, even if injuries seem minor at first. Adrenaline can mask pain from a collision, so it's worth getting checked by a medical professional afterward, particularly after any hard braking or impact.
Once everyone is safe, exchange information with other drivers involved and note details like vehicle positions and road conditions while they're fresh in memory. A written record can help later if there are questions about how the crash unfolded.
