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BRENTWOOD, Los Angeles County, Calif., Oct. 21, 2026 — A multi-vehicle crash blocked a lane on southbound I-405 near Sunset Boulevard early on Tuesday morning, October 20, according to the California Highway Patrol. Injuries were reported, though the extent was not released.
The California Highway Patrol described two to three vehicles involved, with at least one blocking the number one lane. A gray Cadillac Escalade was reportedly among the vehicles involved, though it was initially unclear whether it was blocking traffic.
Los Angeles police officers responded to the scene and confirmed that one lane was blocked. California Highway Patrol personnel requested a Freeway Service Patrol unit to assist around 5:35 a.m. The incident was later reclassified from a collision with unknown injuries to one involving a still-en-route response.
By 6 a.m., all lanes had reopened, according to the dispatch log. Separate tow requests followed for a Ford F-150 with moderate front-end damage and an Escalade with rear-end damage, both logged as needing a vehicle removed from the scene. Tow operators from multiple companies were dispatched to clear the vehicles.
The circumstances of the crash remain under investigation. No further details on injuries or the number of people involved had been released as of Tuesday morning.
We hope those who were hurt recover fully and quickly.
More on Crashes in Brentwood, CA
This crash happened at I-405 and Sunset Boulevard in Brentwood, CA. We cover crashes across Los Angeles County as they're reported, and you can browse the latest in our Los Angeles County accident reports.
Frequently Asked Questions
How do weather and road conditions affect crash risk?
Wet pavement, poor visibility, and low early-morning light can all reduce traction and reaction time, making multi-vehicle pileups more likely on busy freeways.
What should I do right after a car accident?
Move to a safe spot if possible, check for injuries, call 911, and exchange information with other drivers. Even if injuries seem minor, a medical check and a written report can matter later.
Where do most traffic crashes happen?
Many crashes cluster on high-volume freeway corridors and near on-ramps or merge points, where speed differences between vehicles are greatest.
What to Do After a Car Accident in Brentwood, CA
If you're involved in a crash on a freeway like the 405, try to get your vehicle to the shoulder if it's drivable and turn on hazard lights. Call 911 right away and wait for help in a safe spot away from traffic lanes. Even if you feel fine, get checked by a medical professional, since some injuries from a collision don't show symptoms immediately. Take photos of the scene if you're able, and get a copy of the official report once it's available. Reach out to your insurance provider promptly to begin the claims process.
