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IRVINE, Orange County, Calif., Oct. 28, 2026 — A multi-vehicle crash blocked the middle lanes of northbound I-405 near MacArthur Boulevard on Tuesday afternoon, October 27, according to the California Highway Patrol.
The California Highway Patrol's incident log shows the first report came in shortly after 3 p.m., describing a white Honda Odyssey involved with another vehicle blocking a middle lane. Within minutes, additional reports described a dark colored pickup involved with two more vehicles, a black sedan and an SUV, and a separate gray Honda Civic and gray Lexus blocking middle lanes as well. It remains unclear from the log whether these reports describe one evolving crash or a chain of related collisions in the same stretch of freeway.
Two tow companies were requested to the scene, according to the dispatch log, and units from the Santa Ana (Station 91) area were sent to assist. EMS was dispatched to assess and evaluate those involved, and the extent of any injuries has not been confirmed so far.
The roadway was reported clear by about 3:27 p.m., less than half an hour after the first call came in. The California Highway Patrol has not released further details on how the crash occurred, and the incident remains under review.
We hope everyone involved is okay, and we will share more as details are confirmed.
Intersection Crashes in Irvine and Across California
This multi-vehicle crash happened at I-405 and MacArthur Boulevard in Irvine, CA. We follow crashes at intersections across California, and our California intersection crash page brings that information together in one place.
Frequently Asked Questions
Are secondary crashes common after an initial wreck?
Yes. When a crash blocks lanes on a busy freeway, slowing or stopped traffic behind it creates a hazard for approaching drivers, and a second collision can follow quickly, especially in heavy flow like the 405.
What makes multi-vehicle crashes hard to investigate?
With several vehicles involved, investigators often have to work out the order in which impacts happened and whether one collision triggered another, which can take longer than a standard two-car crash.
What causes multi-vehicle pile-ups?
Common factors include sudden braking, lane changes in heavy traffic, reduced visibility, and following too closely, though the specific cause of any individual crash is determined by investigators, not assumed.
What to Do After a Multi-Vehicle Crash in Irvine, CA
If you're involved in a multi-vehicle crash, try to move to a safe spot out of traffic if your vehicle is drivable and it's safe to do so. Turn on hazard lights and check on anyone nearby before calling 911. Even if you feel fine, it's worth having a medical evaluation soon after, since some injuries from a multi-car collision don't show symptoms right away. Exchange information with other drivers if possible, and note what you remember about how the crash unfolded, since that can matter when several vehicles are involved. Keep a copy of any CHP or police report, and follow up with your insurance provider once you've been checked out.
