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DOWNEY, Los Angeles County, Calif., Oct. 7, 2026 — A pileup involving several vehicles blocked lanes on westbound I-105 near Lakewood Boulevard on Tuesday morning, October 6, according to the California Highway Patrol. At least one person was reported hurt, and a SigAlert closed multiple lanes for roughly an hour.
The crash was first reported as a vehicle with a trailer blocking a lane, then grew to involve at least three vehicles. A pickup towing a trailer reportedly crossed the lanes and struck the right shoulder wall, according to the agency, which said the pickup appeared to have caused the collision. Other vehicles became involved as the wreckage spread across the roadway.
Fire crews responding to the scene classified it as a four-vehicle pileup that stopped all westbound traffic near Lakewood Boulevard, based on radio traffic from the scene. CHP later listed the collision as a minor-injury crash. Downey Fire Department personnel were called to handle medical response.
Officials closed all four lanes of the freeway for a time, leaving only the carpool lane open, before gradually reopening them. Multiple tow trucks were requested to clear the vehicles, and the SigAlert was lifted after about an hour. The extent of injuries has not been detailed publicly.
The CHP has not released further information on the vehicles or people involved, and the incident remains logged as closed pending any follow-up report. No additional details on the cause were available Tuesday.
Our thoughts are with those who were injured, and we wish them a full recovery.
Where Multi-Vehicle Pileups Tend to Start
Freeway pileups like the one on I-105 usually begin in the same kinds of places: stretches near on-ramps, merge points, and lane drops where speeds vary and drivers must react fast to vehicles entering or slowing ahead. A single vehicle losing control or stopping unexpectedly in a travel lane can trigger a chain reaction before trailing drivers have time to brake.
Wide urban freeways with four or more lanes compound the problem. Vehicles in different lanes are moving at different speeds, sightlines are blocked by trucks or trailers, and a crash that starts in one lane can spread sideways as cars swerve to avoid it. Trailers and towed loads add another variable, since they can detach, jackknife, or sweep across lanes if the towing vehicle loses control.
Investigators look closely at these conditions when multiple vehicles are involved, because establishing which impact happened first usually determines how the rest of the chain unfolded.
According to the Insurance Institute for Highway Safety, 17,008 motor-vehicle crash deaths occurred outside passenger vehicles in crashes involving passenger vehicles in 2023.
Frequently Asked Questions
What makes crashes with several vehicles harder to investigate?
Investigators have to reconstruct the order of impacts, since each vehicle's damage can reflect more than one collision. Witness accounts usually conflict, and skid marks or debris fields can overlap from multiple points of contact.
What typically causes a chain-reaction pileup?
A single incident, such as a vehicle losing control, stopping suddenly, or crossing into another lane, can trigger it. Following vehicles may not have enough distance or time to stop, especially at freeway speeds.
How can drivers lower their chances of getting caught in one?
Keeping extra following distance, slowing down near ramps and merge points, and staying alert for brake lights ahead can help drivers react sooner if traffic suddenly compresses.
What to Do After a Multi-Vehicle Crash in Downey, CA
If you're involved in or witness a multi-vehicle crash, move to a safe location if possible and call 911 right away. Even if you feel fine, it's worth getting checked by a medical professional, since injuries from multi-vehicle collisions aren't always obvious right after impact.
Try to note what you saw, including the order vehicles appeared to collide and any specific lane positions, since this can help investigators piece together what happened. Exchange information with other involved drivers when it's safe, and file a report with police or the California Highway Patrol if one hasn't already been started. Expect delays in getting full details, since multi-vehicle crashes usually take longer to sort out than single-car collisions.
