[01-05-2026] San Bernardino County, CA – Semi-Truck Overturns on Southbound Interstate 15 Near Cajon Pass, Triggering SigAlert

A semi-truck overturned on southbound Interstate 15 near the Cajon Pass in San Bernardino County, prompting lane closures and a prolonged SigAlert on Monday, January 5, 2026. 

According to the California Highway Patrol, the crash was reported around 10:00 a.m. on the southbound I-15 just north of State Route 138. 

All southbound lanes were initially closed, though one lane reopened shortly after 11:00 a.m. CHP said that by 1:00 p.m., lanes one and two were open while lanes three and four remained closed. As of 2:40 p.m., only lane four was still blocked. A SigAlert was issued just before 10:30 a.m. and remained in effect as of 4:20 p.m.

Authorities said at least one other vehicle was involved in the crash. Traffic was backed up into the high desert for much of the day, and no immediate information regarding injuries was available.

The cause of the crash is under investigation.

Don’t Know What To Do After An Accident?

Your safety and rights depend on what you do next after an accident. Remember the following steps if you find yourself in one:

• Check yourself for any injuries.
• Stay on the scene, call 9-1-1, and wait for emergency responders.
• Move your vehicle to the road shoulder if safe; turn on hazard lights.
• Fully cooperate with law enforcement and stay until cleared to leave.
• Document the scene and injuries with photos and videos.
• Seek immediate medical attention.
• Contact your insurance company and find a personal injury lawyer for legal advice.

What A Lawyer Can Do For You

Many victims put off calling a lawyer even if they sustain injuries after an accident. However, lawyers can help you in many ways. They can provide you with police reports, CCTV footage, and witness statements to strengthen your case. Your attorney will also negotiate with insurance companies to get you fair compensation. The best part is that they will do all of these things for you at no upfront cost. So if you’re injured in an accident, hire a personal injury attorney to recover medical bills, car repair costs, lost wages, and pain and suffering.