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ANAHEIM, Orange County, Calif., Sept. 22, 2026 — A four-vehicle crash blocked the westbound Highway 91 FastTrak (express toll) lanes near Imperial Highway in Anaheim on Monday afternoon, September 21.
The California Highway Patrol said a box truck was first reported stalled in a toll lane shortly before 4:40 p.m. Within minutes, the incident had grown into a crash involving a white Tesla, a box truck, and two additional sedans, blocking both FastTrak lanes, the agency reported. The log initially described the incident as a three-vehicle collision before the California Highway Patrol confirmed four vehicles were involved, including a silver Chevrolet sedan.
Emergency crews and Freeway Service Patrol units responded to the scene, and there were requests for medium and heavy-duty tow support to clear a disabled box truck from the roadway. The lanes remained closed for roughly an hour while crews worked the scene, with the California Highway Patrol reporting all toll lanes reopened by about 5:47 p.m. once tow trucks removed the involved vehicles.
The extent of any injuries has not been released. It is unclear whether anyone was transported for medical treatment, and the cause of the crash remains under investigation.
We wish those injured a full recovery.
How Investigators Piece Together a Multi-Vehicle Crash
When several vehicles collide in a short space of time, as happens in chain-reaction crashes on busy freeways, investigators have to work backward through the sequence of impacts before they can say what happened. That process starts at the scene with measurements, photos, and witness statements, but it rarely ends there.
Vehicle damage, positioning, and any available video or telematics data are compared to figure out which impact came first and how the others followed. When a stalled or disabled vehicle is involved, investigators also have to determine how long it had been in the roadway and whether other drivers had time to react. This kind of reconstruction takes time, usually weeks, because agencies want the sequence to hold up before it becomes part of a final report.
Names of those involved are typically withheld until relatives have been notified, and any toxicology or mechanical findings can add further delay. According to the National Highway Traffic Safety Administration, 365 large-truck occupants were killed in multi-vehicle crashes involving large trucks in 2023, a reminder that these investigations frequently carry weight well beyond the paperwork involved.
Frequently Asked Questions
What makes multi-vehicle crashes difficult to investigate?
Each additional vehicle adds another set of variables: speed, following distance, reaction time, and point of impact. Investigators have to sort out which collision triggered the others before assigning any sequence of events.
What typically causes a pile-up like this?
Chain-reaction crashes sometimes start with one vehicle stopping or stalling unexpectedly in traffic, followed by other drivers who don't have enough space or time to stop safely behind it.
How can drivers stay safer in heavy freeway traffic?
Leaving extra following distance and staying alert to brake lights and hazard flashers ahead can give a driver more time to react if a vehicle stops suddenly in a travel lane.
What to Do After a Multi-Vehicle Crash in Anaheim, CA
If you're involved in a multi-vehicle crash, move to a safe location if possible and call 911 to report injuries and get emergency responders on scene. Even if you feel fine, it's worth getting checked by a medical professional, since some injuries from sudden stops or impacts don't show symptoms right away.
Exchange information with other drivers involved and, if you can safely do so, take photos of vehicle positions and damage before vehicles are moved or towed. Once you're safe, you can request a copy of the official crash report from the California Highway Patrol, which can take time to finalize as the investigation continues.
