SANTA ROSA, Sonoma County, Calif., Oct. 16, 2026 — A chain reaction crash involving four vehicles blocked westbound State Route 12 near Llano Road on Thursday morning, October 15, according to the California Highway Patrol.
The crash was reported shortly before 8 a.m. and involved a parked maroon Dodge Ram pickup, a gray Honda Civic, a big rig hauling two dump trailers, and a white dump truck. A red GMC involved in the collision was reportedly left blocking a turn lane, and the wreckage closed at least one westbound lane for part of the morning.
At least one person was hurt, though the extent of injuries has not been released. Tow crews were called to the scene, including one company dispatched to remove the parked pickup, and a rotation tow service out of Sebastopol was also requested. The CHP had reclassified the incident from a collision with unknown injuries to one with injuries confirmed and a unit en route.
The cause of the pileup has not been confirmed. The police have not said whether any citations have been issued, and the crash remains under investigation.
We hope everyone who was hurt makes a full and speedy recovery.
More on Crashes in Santa Rosa, CA
This multi-vehicle crash happened at State Route 12 and Llano Road in Santa Rosa, CA. We cover crashes across Sonoma County as they're reported, and you can browse the latest in our Sonoma County accident reports.
Frequently Asked Questions
Why do chain-reaction crashes happen?
They typically start when one vehicle slows, stops, or collides unexpectedly and following vehicles don't have enough space or time to react, triggering a sequence of impacts.
How can drivers avoid getting caught in a pile-up?
Keeping a safe following distance, watching traffic several cars ahead, and slowing down early when brake lights appear can help drivers react before a chain reaction reaches them.
What should I do if I'm stopped near a crash on the highway?
Stay in your vehicle with your seatbelt on if it's safe to do so, turn on hazard lights, and move onto the shoulder only if you can do it without stepping into live traffic lanes.
What to Do After a Multi-Vehicle Crash in Santa Rosa, CA
If you're involved in a multi-car wreck, check yourself and any passengers for injuries before stepping out, and move to a safe spot away from traffic if possible. Call 911 even if damage looks minor, since some injuries don't show symptoms right away. Exchange information with other drivers, take photos of the scene if you're able, and get checked out by a medical professional within a day or two of the crash. Keep a copy of the CHP incident report for your records, and follow up with your insurance company once you've had time to assess the damage.
