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WEST LOS ANGELES, Los Angeles County, Calif., Oct. 31, 2026 — A multi-vehicle crash blocked lanes on northbound Interstate 405 at National Boulevard on Friday morning, October 30, according to the California Highway Patrol. At least one person was hurt and taken to a hospital, the agency's traffic log shows.
The crash was first reported as a collision with unknown injuries just north of National Boulevard on the northbound 405. The agency later reclassified it as a collision with injuries after responders reached the scene. Logs describe the crash as involving three vehicles, including a black sedan, a black SUV, and a gray sedan, though an earlier entry referenced a fourth vehicle before the reporting party was recalled.
The wreck left at least one vehicle sideways in the carpool lane, and the carpool lane along with the number one lane were blocked for a time. One person was transferred to Los Angeles Fire Department personnel for treatment. A black Nissan Sentra and a Nissan Versa were among the vehicles involved, and tow trucks were later requested to clear both from the scene, with owners asking for specific companies.
No further details on injury severity or the number of people hurt had been released as of Friday. The cause of the crash had not been confirmed, and the CHP had not said whether speed or any other factor played a role. The incident remains under investigation.
We wish those injured a full recovery.
Intersection Crashes in California
This multi-vehicle crash happened at Interstate 405 and National Boulevard in West Los Angeles, CA. Our California intersections page covers intersection crashes across California.
Frequently Asked Questions
Are crashes more likely to happen after an initial collision on a freeway?
Yes. Once a crash blocks lanes, slowed or stopped traffic behind it creates a hazard for approaching drivers, especially in fast-moving freeway lanes like the carpool lane, which can lead to additional collisions before the scene is cleared.
Why are multi-vehicle crashes harder to sort out than two-car wrecks?
Investigators have to determine how each vehicle struck the others and in what order, which usually takes longer when several cars, drivers, and witness accounts are involved.
What typically causes a chain-reaction pileup like this one?
Sudden braking, lane changes, or an initial collision can trigger a chain reaction as following vehicles run out of room or time to stop, particularly in congested lanes such as a carpool or left lane.
