Underride Truck Accidents
Underride Truck Accident Lawyer in San Antonio
Underride accidents are among the deadliest types of truck crashes. They occur when a smaller vehicle slides underneath the side or rear of a large truck or trailer, often shearing off the top of the passenger vehicle and causing catastrophic or fatal injuries to its occupants. Despite decades of safety advocacy and incremental regulatory improvements, underride accidents continue to claim hundreds of lives across the United States each year.
If you or a loved one has been involved in an underride accident in the San Antonio area, the Law Offices of Ronald A. Ramos, P.C. is here to help. Our firm has more than 30 years of experience with serious truck accident cases, and we understand the investigation, engineering analysis, and legal strategy required to hold trucking companies and other responsible parties accountable.
Types of Underride Accidents
Rear underride accidents happen when a passenger vehicle strikes the back of a truck trailer and slides beneath it. This commonly occurs when a truck is traveling significantly slower than surrounding traffic, is stopped or disabled on the roadway without adequate warning, or merges into traffic without sufficient speed. Federal law has required rear underride guards on trailers since 1998, but studies have shown that many existing guards fail to prevent underride in real-world crash conditions, particularly at higher speeds or offset angles.
Side underride accidents occur when a passenger vehicle collides with the side of a truck trailer, typically during a crossing maneuver at an intersection or when a truck is making a turn across traffic. Because there is currently no federal requirement for side underride guards in the United States, the gap between the truck’s wheels and the bottom of the trailer leaves a large opening that smaller vehicles can slide into. Legislation known as the Stop Underrides Act has been introduced in Congress multiple times to mandate side guards, but as of now, installation remains voluntary.
Override accidents are the reverse scenario — a large truck rides over the top of a smaller vehicle, usually in a rear-end collision where the truck strikes the back of a car. The height difference between the truck’s front bumper and the car’s trunk allows the truck to climb over the smaller vehicle, with devastating results.
Why Underride Accidents Are So Deadly
The reason underride crashes are disproportionately fatal comes down to structural engineering. Modern passenger vehicles are designed with crumple zones, airbags, and reinforced safety cages that absorb and distribute crash energy to protect occupants. In an underride collision, none of these safety systems function as intended. The vehicle slides beneath the truck at a height that bypasses the car’s structural protections entirely, and the trailer’s edge strikes at or near the level of the passenger compartment.
The result is frequently decapitation, crushing injuries to the head and chest, or complete destruction of the vehicle’s passenger compartment. Even in non-fatal underride crashes, survivors typically suffer traumatic brain injuries, spinal cord damage, severe facial and skull fractures, and other life-altering injuries that require extensive medical treatment and long-term care.
Liability in Underride Accident Cases
Underride accidents often involve multiple layers of liability that extend beyond the truck driver. The trucking company may be liable for failing to equip its trailers with adequate underride guards, failing to maintain existing guards, or operating trailers that do not meet current safety standards. The trailer manufacturer or guard manufacturer may bear responsibility if the underride guard was defectively designed or manufactured and failed to perform as intended during the crash.
The truck driver can be held liable for conduct that caused or contributed to the crash, such as stopping in a travel lane without activating hazard lights, failing to use reflective triangles when disabled, making an improper turn across traffic, or operating without functioning rear lighting. In cases involving side underride, evidence that the trucking industry has known about the risks for decades yet resisted mandatory side guard requirements can support claims for exemplary damages.
Our legal team works with engineers and accident reconstruction professionals who can analyze guard failure modes, crash dynamics, and compliance with applicable safety standards to build a compelling case for liability.
Federal Regulations and Safety Standards
The FMCSA and the National Highway Traffic Safety Administration (NHTSA) regulate underride guard requirements under 49 CFR Part 393.86. Current federal standards require rear impact guards on most trailers manufactured after January 1998. These guards must meet minimum strength requirements established by NHTSA, though safety advocates have long argued that the current standards are inadequate and fail to prevent underride in many common crash configurations.
In December 2022, NHTSA issued an updated final rule strengthening rear impact guard standards for new trailers, requiring guards to withstand higher force levels across a wider area. However, this rule applies only to newly manufactured trailers and does not require retrofitting existing equipment. This means that millions of older trailers with weaker guards or no guards at all remain on the road.
There is currently no federal mandate for side underride guards on commercial trailers in the United States, though they are required in the European Union and several other jurisdictions. Research conducted by the Insurance Institute for Highway Safety has demonstrated that side guards can be effective at preventing or reducing the severity of side underride crashes.
Compensation for Underride Accident Victims
Given the catastrophic nature of underride injuries, victims and their families may be entitled to substantial compensation. Recoverable damages can include all past and future medical expenses, lost income and lost earning capacity, physical pain and suffering, mental anguish and emotional distress, disfigurement and physical impairment, and loss of consortium for the victim’s spouse. In wrongful death cases, surviving family members may recover funeral and burial expenses, loss of financial support, loss of companionship, and mental anguish damages.
Texas law allows for exemplary (punitive) damages in cases involving gross negligence or willful disregard for safety. When a trucking company knowingly operates trailers with inadequate or defective underride protection, this conduct may support a punitive damages claim.
Contact a San Antonio Underride Accident Attorney
Underride accident cases require prompt action. Physical evidence at the crash scene, electronic data from the truck, and the condition of the underride guard must be preserved before they are altered or destroyed. Contact the Law Offices of Ronald A. Ramos, P.C. for a free consultation to discuss your case. We are ready to fight for the compensation you and your family deserve.
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