Available 
Bel Air, CA (September 8, 2026) – One person died on Monday afternoon, September 7, in a five-car crash on the northbound 405 Freeway in the Sepulveda Pass. The wreck was reported just after 2:30 p.m. near Sunset Boulevard.
Authorities said one person was pronounced dead at the scene. That victim has not been publicly identified. A second person was taken to a hospital with minor injuries.
The crash involved five vehicles, according to authorities, though details on how the collision unfolded have not been released. Los Angeles Fire Department crews and Los Angeles police officers responded and worked the scene together on Monday afternoon.
The crash snarled traffic on the northbound 405 for hours, and authorities urged drivers to seek alternate routes while crews cleared the scene. No cause has been released, and the crash remains under investigation. Authorities have not said whether any citations or charges are expected.
Our condolences go out to the family and friends of the deceased.
When Multi-Vehicle Freeway Pileups Are Most Likely
Chain-reaction crashes involving several vehicles tend to cluster around the times when traffic is heaviest, and drivers are most distracted or rushed. Holiday afternoons, like a Labor Day commute mixed with regular weekday traffic, can bring sudden slowdowns that catch drivers off guard. A single hard brake at the front of a pack can set off a series of rear-end collisions before anyone has time to react.
Weather plays a role, too. Rain reduces tire grip and visibility, and even a light drizzle after a long dry spell can make pavement slicker than drivers expect. Evening light changes, glare from wet roads, and stop-and-go congestion all add up during commute windows, when many multi-car pileups occur.
According to the National Highway Traffic Safety Administration, 28,595 large-truck occupants were injured in multi-vehicle crashes involving large trucks in 2023. That figure reflects how quickly a chain-reaction crash on a busy freeway can multiply the number of people hurt, since one initial collision often pulls in vehicles that had no time to stop.
Frequently Asked Questions
Where do fatal multi-vehicle crashes most often happen?
They’re common on freeways and highways where speeds are higher and traffic merges or slows suddenly, especially in mountain passes or areas with limited sightlines.
What makes a crash more likely to turn deadly?
Higher speeds, sudden stops in heavy traffic, and a mix of vehicle sizes all raise the odds of serious injury. Reduced visibility due to weather or darkness can increase the risk.
Does speed affect whether people survive a crash?
Yes. Even modest increases in speed reduce drivers’ reaction time and increase the force of a collision, which raises the risk of serious injury.
Why does wearing a seat belt matter so much in these crashes?
Seat belts keep occupants from being thrown against interior surfaces or ejected during a collision, and they remain one of the most effective ways to reduce deaths in multi-vehicle crashes.
What to Do After a Multi-Vehicle Freeway Crash in Bel Air, CA
If you’re involved in a pileup on a freeway, try to move to the shoulder if your vehicle is drivable and it’s safe to do so, and turn on hazard lights to warn oncoming traffic. Call 911 right away and stay as far from moving lanes as possible while waiting for help.
Even if you feel fine, get checked by a medical professional, since injuries from impacts can take hours or days to show symptoms. Take photos of the scene if you’re able, and get contact information from anyone involved or nearby who witnessed what happened.
Promptly reporting the crash to local police and your insurance company helps establish an accurate record while details are still fresh. Give yourself time to process what happened. These crashes are frightening, and it’s normal to need support afterward.
