Truck Underride Accident Lawyer
An underride crash happens when a passenger vehicle slides under the back or side of a trailer, often shearing off the car's roof. Federal law requires rear underride guards on most trailers; when a guard fails, is missing, or is poorly maintained, both the carrier and trailer manufacturer can be liable.
Key Takeaways
- Rear underride guards are federally required (49 CFR §393.86) but side guards are not, leaving a major gap.
- Underride crashes are frequently fatal due to direct passenger-compartment intrusion.
- Reflective tape and lighting requirements affect nighttime visibility of trailers.
- Guard defects support product liability claims against manufacturers.
Why underride crashes are so lethal
A trailer's bed sits at roughly bumper height for most cars, well above where a windshield and roof are designed to absorb impact. When a car strikes the rear or side of a trailer and slides underneath, the collision forces bypass the vehicle's crumple zones entirely and strike the passenger compartment directly.
Rear underride guards are required by federal law, but they must meet strength and positioning standards to actually stop a car — many older or damaged guards fail catastrophically on impact. Side underride guards remain optional in the U.S. despite widespread advocacy and their mandatory use in other countries.
Proving an underride case
Investigation focuses on whether the guard met federal strength standards, was properly maintained, or was missing or damaged, and on the trailer's visibility — reflective tape, marker lights, and their maintenance. Where the guard itself failed under normal impact forces, a product liability claim against its manufacturer often runs alongside the negligence claim against the carrier.
These cases frequently involve catastrophic injury or wrongful death, and the interplay of vehicle design standards with roadway visibility conditions typically requires biomechanical and highway engineering experts.
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Frequently Asked Questions
Are all trailers required to have underride guards?+
Rear guards are federally required on most trailers. Side underride guards are not mandated in the U.S., which is a significant, ongoing safety gap.
What if the underride guard failed on impact?+
That can support a product liability claim against the guard or trailer manufacturer, in addition to negligence claims against the carrier for maintenance or visibility failures.
Are underride crashes usually fatal?+
They carry a disproportionately high fatality and catastrophic injury rate because of direct intrusion into the passenger compartment.