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SAN DIEGO, San Diego County, Calif., Oct. 1, 2026 — Three vehicles collided Wednesday afternoon, September 30, on Interstate 5 North near Genesee Avenue in San Diego, according to the California Highway Patrol. The crash left at least one person with minor injuries, the agency reported.
The California Highway Patrol said the collision was first reported shortly before 4:35 p.m. and initially blocked the slow lane. Officers later said the wreckage was blocking lanes 3 and 4 as well.
A tow truck was requested for two of the vehicles involved. The CHP upgraded the incident from a report of a crash with a vehicle enroute to the scene to one confirmed to involve a minor injury.
The California Highway Patrol has not released additional details on the drivers, passengers, or vehicles involved.
We wish the injured a swift and full recovery.
Why Highway Speeds Turn Routine Traffic Contact Into Multi-Vehicle Crashes
Most multi-vehicle crashes on freeways like I-5 do not start as dramatic events. They start with a small misjudgment: a driver follows too closely, brakes a beat late, or drifts while reaching for a phone. At surface-street speeds, that mistake might produce a fender bender. At 65 or 70 mph, the same mistake multiplies the distance a car travels before a driver can react, and it multiplies the force behind any impact.
Once one vehicle is forced to slow or stop in a travel lane, the vehicles behind it have only a few seconds to see the hazard, judge the gap, and brake or steer around it. On a busy stretch like I-5 through San Diego, traffic is often moving fast and close together, so a single braking car can trigger a chain reaction involving two, three, or more vehicles before anyone has a chance to stop fully.
According to the National Highway Traffic Safety Administration, 365 large-truck occupants were killed in multi-vehicle crashes involving large trucks in 2023. That figure reflects how much more dangerous a highway collision becomes once a heavier vehicle is pulled into the chain, since added weight and speed both raise the force involved when vehicles strike each other or come to a sudden stop.
Frequently Asked Questions
What should I do if I'm stopped near a crash on the highway?
Turn on hazard lights, stay in your vehicle if it's not safe to exit, and move as far from traffic lanes as possible. If you can safely reach the shoulder, do so instead of remaining stopped in a travel lane.
How does fog or low visibility contribute to pile-ups?
Reduced visibility shortens the distance drivers have to spot slowed or stopped traffic ahead, which can turn a single stopped car into a chain-reaction crash involving several vehicles.
Why is following distance so important?
A larger gap gives a driver more time to react and brake if the vehicle ahead slows suddenly. At highway speeds, even a half-second of extra reaction time can be the difference between stopping safely and colliding.
Are secondary crashes common after an initial wreck?
Yes. Vehicles that slow or stop to avoid an earlier crash can themselves get struck from behind, especially if the original wreck isn't visible until the last moment.
What to Do After a Multi-Vehicle Crash in San Diego, CA
If you're involved in a multi-vehicle crash on a freeway, try to move to the shoulder or a safe area if your vehicle is drivable and it's safe to do so. Turn on hazard lights and check on passengers and nearby drivers before exiting a vehicle in traffic.
Even if injuries seem minor at the scene, it's worth getting checked by a medical provider afterward, since some injuries from sudden stops or impacts don't show symptoms right away. Request a copy of the official collision report once it's available, and keep records of any medical visits tied to the crash.
