Modesto, CA — August 19, 2025, One person was injured following an 18-wheeler accident that occurred at around 5:00 A.M. on South 9th Street.
According to reports, a vehicle was traveling on South 9th Street when for unknown reasons it struck the rear of an 18-wheeler followed by a fence.
When first responders arrived on the scene they found the driver of the passenger vehicle had been impaled from a piece of the fence and was taken to the hospital in serious condition. Neither the identity of the driver nor an update on the investigation has been released by officials.
Commentary by Attorney Michael Grossman
What remains unanswered in the reports is why the passenger vehicle struck the rear of the 18-wheeler to begin with. That’s the starting point for understanding this crash. Was the truck slowing or stopped in the roadway? Did the car’s driver fail to notice traffic ahead? Or could mechanical issues, distraction, or impairment have played a role? Each scenario points in a very different direction when it comes to responsibility.
Rear-end collisions with large trucks require a close look at both vehicles. The truck’s engine control module can confirm whether it was moving, slowing, or stopped when it was hit. If the truck was stopped or traveling below the flow of traffic, investigators will need to determine whether it was positioned safely and visible to oncoming drivers. At the same time, the passenger vehicle’s onboard systems and phone records may provide insight into whether distraction or speed contributed.
Another factor to consider is whether the truck’s lights and reflective markings were in proper working order. A poorly lit trailer at night can be extremely difficult for approaching drivers to see until it’s too late. In my experience, crashes like this rarely come down to just one mistake—it’s often a combination of factors that only a thorough investigation can uncover.
Key Takeaways:
- The central question—why the car struck the rear of the truck—remains unanswered.
- Black box data from the truck and onboard systems from the car can clarify what each vehicle was doing.
- Visibility issues, such as lights and reflective markings, must be examined.
- A complete investigation is needed to determine whether the fault lies with the car’s driver, the truck, or both.
