March 9, 2026 11:14 PM

Semi plows through semi’s trailer, splitting it in half on I-15

CAJON PASS, CA. (Pain In The Pass) >> Foggy and wet conditions likely led to a serious crash on Interstate 15 at the top of the Cajon Pass early Thursday afternoon, according to California Highway Patrol. (Photo above is credit by Rudy Jimenez)

The collision occurred about 12:46pm on February 1, 2024. The crash location was on northbound I-15 at the Oak Hill Road exit. It was reported to be a total of three semi tractor trailers were involved in this collision.

It’s unknown what led up to the collision at this time. One semi looked to disabled or became jackknifed in lanes. Then a second semi plowed straight through the middle of the first truck’s trailer, splitting it in half. This caused pallets and boxes to scattered debris all over the roadway. the third semi had minor damage to the rear of the trailer.

There is no word on injuries from the crash.

Emergency crews were on the scene investigating and cleaning up the debris for several hours Thursday afternoon and into the evening.

CHP issued a SIG Alert at 12:55pm for the #3 and #4 lane and Oak Hill Road offramp exit for the removal of the trailers. As of 2:40pm CHP was blocking the #4 and Oak Hill exit as they off load both trailers.

We will update this story with more information when the CHP’s preliminary accident report is available. Additional details were limited at this time. This incident will be under investigation by the California Highway Patrol, Inland Office. 

There are more ways to follow the Pain In The Pass. Join the Traffic Group on Facebook with over 136,000 members. Join the group on MeWe. Like us on the NEW page on Facebook. Follow us on NewsBreak, and also follow us on Instagram, Threads, and X aka Twitter.

loader-image
Cajon Pass
11:14 pm, Mar 9, 2026
temperature icon 50°F
clear sky
Humidity: 75 %
Pressure: 1014 mb
Wind: 12 mph
Wind Gust: 9 mph
Clouds: 0%
Visibility: 10 km
Sunrise: 7:08 am
Sunset: 6:52 pm
  • Temperature
  • Precipitation
  • Rain Chance
  • Wind
  • Humidity
  • Pressure
2:00 am
temperature icon
36°/45°°F 0 mm 0% 5 mph 76% 1014 mb 0 mm/h
5:00 am
temperature icon
35°/40°°F 0 mm 0% 6 mph 81% 1014 mb 0 mm/h
8:00 am
temperature icon
38°/38°°F 0 mm 0% 8 mph 82% 1016 mb 0 mm/h
11:00 am
temperature icon
58°/58°°F 0 mm 0% 5 mph 54% 1017 mb 0 mm/h
2:00 pm
temperature icon
64°/64°°F 0 mm 0% 7 mph 43% 1016 mb 0 mm/h
5:00 pm
temperature icon
60°/60°°F 0 mm 0% 8 mph 44% 1016 mb 0 mm/h
8:00 pm
temperature icon
53°/53°°F 0 mm 0% 5 mph 70% 1019 mb 0 mm/h
11:00 pm
temperature icon
51°/51°°F 0 mm 0% 3 mph 69% 1021 mb 0 mm/h