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ONTARIO, San Bernardino County, Calif., Oct. 16, 2026 — A car crashed into a box truck and rolled over on westbound Interstate 10 near the Interstate 15 interchange on Thursday morning, October 15. The crash blocked multiple lanes and prompted a SigAlert that closed part of the freeway for about an hour.
The California Highway Patrol said a silver sedan collided with a box truck and overturned, coming to rest blocking the second and third lanes. Bystanders described in radio traffic as "good Samaritans" worked with Ontario Fire personnel to pull occupants from the vehicle before crews arrived.
Ontario Fire units responded to the scene and reported a fuel spill from the wreck, which was later contained. A separate two-vehicle crash involving a transit bus was also logged nearby around the same time with a minor injury reported, though it was not immediately clear whether it was connected to the freeway backup.
The CHP issued a SigAlert affecting one to two lanes for roughly an hour before all lanes were reported clear. The overturned sedan was eventually towed from the scene. The extent of injuries to those involved has not been released, and the crash remains under investigation.
We hope those who were hurt recover fully and quickly.
More on Crashes in Ontario, CA
This crash happened on Interstate 10 in Ontario, CA. We cover crashes across San Bernardino County as they're reported, and you can browse the latest in our San Bernardino County accident reports.
Frequently Asked Questions
Where do most traffic accidents happen?
A large share of serious crashes happen on highways and freeway interchanges, where speed differences between merging and through traffic raise the risk of sudden collisions.
What injuries are most common in car accidents?
Common injuries include whiplash and other neck or back strain, cuts from broken glass, and head or chest injuries from striking the interior of the vehicle, especially in rollovers.
What are the most common causes of car accidents?
Distracted driving, following too closely, and failing to adjust speed for traffic conditions are frequent factors investigators look at in freeway collisions.
What to Do After a Car Accident in Ontario, CA
If you're involved in a crash on a freeway like I-10, try to move to a safe area if your vehicle is drivable and turn on hazard lights to warn oncoming traffic. Call 911 and wait for paramedics to check you over, even if you feel fine, since some injuries from a collision don't show symptoms right away. Get the names and contact information of any witnesses, and request a copy of the CHP incident report once it's available. Keep records of any medical visits connected to the crash, and give yourself time to rest and recover in the days after.
