Can You Sue the Trucking Company if Your Car Slides Under the Rear Trailer Guard?
A rear-end collision between two passenger cars usually results in a crushed bumper and whiplash. However, when a passenger car rear-ends a commercial semi-trailer, the physics change entirely. Because the bed of a standard 53-foot trailer sits significantly higher than the hood of a typical car, a rear-end collision can easily result in an "underride." The car slides completely underneath the trailer, shearing off the vehicle's roof and roof pillars. These accidents are notoriously gruesome, frequently resulting in decapitation or severe traumatic brain injuries.
To prevent this exact horror, federal law mandates that all modern commercial trailers be equipped with a Rear Impact Guard (RIG), commonly known as a DOT bumper or Mansfield bar. It is a hanging steel frame designed to stop a car from sliding underneath. So, answering the question, "Can you sue the trucking company if your car slides under the rear trailer guard?" depends entirely on proving that the trucking company allowed that crucial safety guard to fall into a state of dangerous disrepair.
A rear impact guard is only effective if it can withstand a massive transfer of kinetic energy. Unfortunately, trucking companies often treat these guards as afterthoughts. Because trailers are constantly backed into loading docks, the steel guards sustain daily impacts. Over time, the welds crack, the mounting bolts loosen, and the steel frame becomes heavily rusted and bent. When a car finally hits a degraded guard, the guard immediately snaps or folds underneath the trailer, offering zero protection.
Proving Maintenance Negligence in Underride Cases
In a rear-end crash, the driver in the back is generally presumed to be at fault for following too closely. However, a specialized transportation attorney can file a separate claim for "Enhanced Injuries." Even if the car driver caused the initial bump, the trucking company can be held strictly liable for the fatal decapitation if their safety equipment failed due to negligence:
Federal regulations have exact specifications for rear impact guards, including maximum ground clearance (usually 22 inches) and structural strength requirements. Attorneys will hire mechanical engineers to inspect the sheared guard. If they find pre-existing rust inside the fractured welds, or evidence that the guard was already bent upward from previous loading dock impacts before the crash, the motor carrier is liable for violating federal maintenance laws.
Truck drivers are legally required to visually inspect the rear impact guard during their daily pre-trip walkaround. If a driver logs that the trailer is in "safe operating condition," but post-crash photos show a guard held together by zip-ties, cheap aftermarket bolts, or severe corrosion, it proves the driver routinely falsified their safety logs.
Rear guards must be covered in bright, red-and-white retroreflective DOT tape. Over time, road grime and pressure washing destroy this tape. If a driver rear-ends a trailer at night because the guard was invisible in the dark, the trucking company is liable for creating a highly fatal, unlit hazard.
Fighting for Justice After a Preventable Tragedy
Insurance companies will fight viciously to deny underride claims by focusing entirely on the passenger car's speed. It requires aggressive litigation and expert metallurgical testimony to prove that while the car caused the bump, the trucking company's gross negligence caused the death.