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CARSON, Los Angeles County, Calif., Oct. 11, 2026 — A crash involving two vehicles blocked lanes on southbound I-405 at Carson Street on Saturday afternoon, October 10, according to the California Highway Patrol. The collision was reported with injuries, and emergency crews responded to clear the roadway.
The California Highway Patrol said the crash was first reported shortly before 2:35 p.m. near the onramp from Carson Street to southbound I-405. The incident initially logged as a no-injury collision was upgraded minutes later to a report of injuries, with at least one person said to be trapped or otherwise requiring extrication.
Los Angeles County Fire Department units responded to assist at the scene, CHP logs show. By mid-afternoon, officers noted that the number-two lane of the on-ramp remained blocked as crews worked to clear wreckage, and CHP dispatch records indicate that officers checked in to confirm whether vehicles were still obstructing traffic.
The extent of the injuries has not been released. The crash remains under investigation, and further details, including what led up to the collision, have not been confirmed.
Our thoughts are with those who were injured, and we wish them a full recovery.
What the Numbers Show About Car Accidents on Freeway Onramps
According to the National Highway Traffic Safety Administration, an estimated 1,947,298 passenger-vehicle occupants were injured in motor-vehicle traffic crashes in 2023. That figure covers the full range of crash types, but it helps explain why even a routine lane change or merge crash, like one near a freeway on-ramp, carries real potential for injury rather than just property damage.
Onramps and merge points are common sites for car accidents because they force vehicles moving at different speeds to share a short stretch of road. Drivers entering the freeway must accelerate and find a gap in traffic while drivers already on the freeway are often moving at highway speed, leaving little time to react if someone misjudges the merge.
These crashes tend to involve rear-end or sideswipe impacts rather than head-on collisions, but they can still block multiple lanes and trigger secondary crashes as traffic backs up behind the scene. That ripple effect is one reason agencies move quickly to clear wreckage and reopen lanes once injuries have been addressed.
Frequently Asked Questions
What usually causes car accidents on freeway onramps?
Common factors include following too closely, misjudging merge speed, and failing to check blind spots. Distracted driving and sudden braking in heavy traffic also play a role.
How does speed affect the severity of a crash like this?
Higher speeds reduce the time a driver has to react and increase the force of impact. Even a modest increase in speed can turn a minor collision into one that results in serious injuries.
Why is distracted driving especially risky in merge areas?
Merging requires constant attention to mirrors, blind spots, and the speed of surrounding traffic. A driver looking at a phone or dashboard screen for even a couple of seconds can miss a closing gap or a slowing vehicle ahead.
Do weather or road conditions make these crashes more likely?
Wet pavement, glare, or debris on an onramp can reduce traction right when a driver needs it most to merge safely. Even dry-weather conditions, such as congestion or poor visibility around curves, can contribute.
What to Do After a Car Accident in Carson, California
If you're involved in a crash on a freeway onramp, try to move to a safe spot out of traffic if your vehicle is drivable, and turn on hazard lights to warn other drivers. Call 911 to report any injuries and request medical evaluation, even if you feel fine at first, since some injuries from these collisions aren't immediately obvious.
Exchange information with the other driver and note any details you can safely observe, such as lane position and time of day. Once you're safe, follow up with your own doctor in the days after the crash and keep records of any medical visits. If a formal CHP report was filed, you can typically request a copy through the agency once it's available.
