PRUNEDALE, Monterey County, Calif., Sept. 29, 2026 — A four-vehicle crash with reported injuries closed lanes on southbound US-101 near State Route 156 in Prunedale on Monday afternoon, September 28, according to the California Highway Patrol.
The CHP said the crash was first reported as a traffic hazard in the number one lane before growing into a multi-vehicle collision involving a green Kia, a white GMC Terrain and a burgundy Honda sedan. A caller told dispatchers she was unsure whether her vehicle was still drivable, and the agency's log noted the GMC Terrain was smoking after the crash.
The collision was initially logged as a hit-and-run with injuries before being downgraded to a hit-and-run with no injuries, and then reclassified again as a minor-injury crash. All parties were said to be out of their vehicles as officers worked to confirm how many people and vehicles were actually involved. A fourth vehicle was later located, and officers reported reaching that driver, who was en route to a CHP office to provide identification.
All southbound lanes were briefly shut down before being reopened. A tow truck was requested for the GMC Terrain after several rotation companies reported no trucks available.
The extent of injuries has not been released, and the crash remains under review. We wish the injured a swift and full recovery.
Where Multi-Vehicle Pileups Tend to Start
Chain-reaction crashes involving three or more vehicles cluster on high-speed highway corridors where traffic merges, slows unexpectedly, or crosses paths with connecting routes. Interchanges like the one where US-101 meets SR-156 combine heavy through-traffic with vehicles entering, exiting, and shifting lanes, all at highway speed, which raises the odds that one driver's sudden brake or lane change catches others off guard.
Undivided highway segments and busy interchange approaches share a common problem: drivers have less time to react once something goes wrong ahead of them. A single vehicle slowing or stopping can trigger a rapid sequence of rear-end and sideswipe impacts before following drivers have room to stop safely.
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. Mixing vehicle sizes, as often happens on interstate corridors carrying everything from sedans to SUVs and commercial trucks, adds another layer of risk when a chain-reaction crash unfolds.
Frequently Asked Questions
Are secondary crashes common after an initial wreck?
Yes. Once a crash blocks a lane or slows traffic, following vehicles that don't adjust speed in time can strike stopped cars or each other, which is why responders often work to clear lanes and warn approaching traffic quickly.
What makes multi-vehicle crashes hard to investigate?
Investigators have to sort out the order of impacts, which vehicle struck which, and whether one collision caused another. Conflicting driver accounts and vehicles that move or leave the scene before officers arrive can complicate that timeline.
What typically causes chain-reaction crashes?
Common factors include following too closely, sudden braking, reduced visibility, and speed differences between vehicles. On highways, a single slowdown can ripple backward through traffic in seconds.
What to Do After a Multi-Vehicle Crash in Prunedale, CA
If you're involved in a multi-vehicle crash, move to a safe location if your vehicle can be driven and turn on hazard lights to warn other traffic. Check yourself and passengers for injuries before checking on others, and call 911 even if injuries seem minor, since adrenaline can mask pain from impacts.
Exchange information with other drivers involved, but avoid discussing fault at the scene. Take photos of vehicle positions and damage if it's safe to do so. Even if you feel fine, a medical evaluation in the days after a crash is worth scheduling, since some injuries from sudden stops or impacts don't show symptoms right away. Keep a copy of the CHP incident report for insurance and personal records.
