Anyone who has driven the I-10, I-12, or U.S. 61 corridors in Baton Rouge knows just how overwhelming big truck traffic can be. Any collision with a tractor-trailer is terrifying, but underride accidents are worst-case scenario wrecks. Because these types of crashes bypass a car’s standard safety features entirely, they are among the most catastrophic collisions on Baton Rouge roads, leaving families devastated.
If you’ve survived an underride crash or are caring for a loved one who was injured, you don’t have to face the legal process alone. An experienced underride accident lawyer can help you understand what happened and who should be held accountable.
Dudley DeBosier Injury Lawyers has spent decades fighting for injured Louisianans against trucking companies and their insurers. Our Baton Rouge truck accident lawyers know how to investigate these complex cases and pursue the compensation you deserve. Contact us today for a free consultation.
What Is a Truck Underride Accident?
An underride accident happens when a car slides underneath a large truck during a collision. The danger comes from the size and height mismatch. A loaded semitrailer can sit several feet off the ground, while a passenger car sits much lower. When the two collide, the car can wedge under the trailer, and the strongest safety features in your vehicle never get the chance to do their job.
These crashes are far deadlier than typical collisions. A review of federal crash data by the U.S. Government Accountability Office (GAO) found that more than 200 people are killed in underride crashes each year, and survivors often face permanent, life-altering injuries.
Rear and Side Underride Crashes and the Mansfield Bar
Underride crashes generally fall into two categories, and the difference matters when it comes to proving liability.
- Rear underride: A vehicle strikes the back of a truck that is stopped, slowing, or poorly lit, and slides beneath the trailer. These often happen at night, in fog, or in heavy Baton Rouge traffic when a truck brakes suddenly.
- Side underride: A vehicle slides beneath the side of a trailer, usually when a truck is turning, changing lanes, or crossing an intersection and the car has no time to stop.
Federal law tries to prevent rear underride crashes with a rear impact guard, the steel bar that hangs below the back of most trailers. It is commonly called a Mansfield bar, named after a fatal underride crash, that pushed regulators to act. Federal law requires trailers and semitrailers built on or after January 26, 1998, with a gross weight rating of 10,000 pounds or more must have a rear guard that meets federal safety standards. Trucking companies are also required to inspect these guards every year.
It’s important to note that there is a serious gap in the law. Federal regulations do not require side underride guards, even though the GAO has urged the government to develop a standard. When a guard is missing, poorly maintained, or never installed where it should have been, failure can become a serious public safety risk and a central piece of evidence in an underride case.
Where Underride Crashes Happen in Baton Rouge
Baton Rouge is one of Louisiana’s busiest freight corridors, and commercial trucks share the road with passenger vehicles around the clock. Certain areas see more truck activity, and more risk, than others.
- Interstate 10 and Interstate 12: Long-haul trucks frequently slow or stop in congestion here, creating rear underride risk when traffic backs up without warning.
- Airline Highway (U.S. 61): A heavily traveled commercial corridor with constant truck traffic moving in and out of businesses and industrial sites.
- Scenic Highway and Plank Road: Routes that carry regular industrial and freight transport through the city.
- The Port of Greater Baton Rouge: Large trucks routinely enter and exit shipping facilities here, often making wide turns that raise the risk of side underride crashes.
- Construction zones: Anywhere in the metro area, shifting lanes and reduced visibility leave little room to react to a slow or stopped truck.
Catastrophic Injuries in Underride Crashes
Because an underride crash compromises the passenger compartment, the injuries are often severe, and many survivors need lifelong care. The catastrophic injuries we see in these cases include:
- Broken bones and complex fractures
- Spinal cord injuries and paralysis
- Traumatic brain injuries (TBIs)
- Crush injuries and internal organ damage
- Amputation injuries
- Fatal injuries that lead to a wrongful death claim
Underride victims in Baton Rouge are often rushed to Our Lady of the Lake Regional Medical Center, the area’s Level 1 trauma center, which handles the kind of severe trauma these crashes cause. Baton Rouge General also operates emergency rooms across the metro area.
Who Is Liable for a Baton Rouge Underride Accident?
Underride cases are rarely simple. More than one party often shares responsibility, and identifying everyone at fault is key to pursuing full compensation. Depending on what the investigation uncovers, the liable parties may include:
- The truck driver, for an unsafe lane change, fatigued or distracted driving, stopping suddenly, or failing to turn on hazard lights when disabled on the shoulder.
- The trucking company, for pushing schedules that encourage fatigue, failing to train drivers, neglecting maintenance, or running trailers with worn or inadequate underride guards.
- A maintenance provider, if it failed to inspect, repair, or replace a rear guard or other safety equipment that should have caught a problem.
- A parts manufacturer, if an underride guard or other component failed because of a defective design or manufacturing flaw, under product liability law.
- Another driver, who set the crash in motion by cutting off the truck or forcing the driver to brake
A properly built and maintained guard lets your car’s airbags, seat belts, and crumple zones work as designed, so a failure anywhere in that chain can become central to your case.
Louisiana Law After an Underride Crash
The deadline to file a personal injury lawsuit changed on July 1, 2024, when the state extended the old one-year window to two years. Don’t let the extension keep you from contacting an experienced truck underride lawyer right away to learn about your legal rights. Critical evidence like the truck’s maintenance records and electronic data can disappear quickly, so it pays to act early.
Also, it’s important to note that Louisiana used to follow a pure comparative fault rule. That changed as of January 1, 2026, to a modified comparative fault system. This means that if you’re found to be 51% or more at fault for a crash, you won’t be able to recover any compensation at all. On the other hand, if your share of fault is 50% or less, you can still recover damages, but they will be reduced by your percentage of fault. Under this new rule, crashes that happen before the January 1, 2026 date are still governed by the old pure comparative fault rule. Trucking insurers know all of this and often try to shift as much blame onto you as possible, which is one more reason to have a lawyer protecting your side of the story.
In the unfortunate event that an underride crash takes a life, Louisiana law allows surviving family members to pursue a wrongful death claim for funeral and burial costs, lost financial support, and the emotional toll of the loss.
Compensation You Can Pursue
Given the severity of these injuries, compensation in underride cases can be substantial. With our help, you can seek damages for:
- Emergency and ongoing medical care and surgeries
- Rehabilitation, physical therapy, and trauma counseling
- Home and vehicle modifications for accessibility
- Lost wages and diminished future earning capacity
- Pain, suffering, and loss of enjoyment of life
You also will not pay anything up front. With our No Fee Guarantee®, you pay us nothing—no fees, costs, or expenses—unless we get you money.
How Our Baton Rouge Truck Accident Lawyers Can Help
Our team knows firsthand that the days after a crash like this are overwhelming. We also know how critical they are to the success of your legal case. That’s why we move quickly to secure evidence like the truck’s black box data, the condition or presence of the underride guard, and the company’s maintenance and hours-of-service records.
Dudley DeBosier has extensive experience handling serious truck accident claims throughout Louisiana. We have the resources to take on large trucking companies, the knowledge of the state and federal regulations these cases turn on, and the willingness to go to trial when an insurer refuses a fair settlement. While we handle the legal fight, you can focus on healing.
Frequently Asked Questions
What Is a Mansfield Bar, and Are Trucks Required to Have One?
A Mansfield bar is the rear impact guard that hangs below the back of a trailer to stop a car from sliding underneath. Under federal regulation 49 CFR 393.86, most trailers and semitrailers built on or after January 26, 1998, must have one that meets federal safety standards, and trucking companies must inspect it every year.
What Is the Difference Between a Rear and a Side Underride Accident?
A rear underride crash happens when a vehicle slides under the back of a truck, while a side underride crash happens when a vehicle slides beneath the side of a trailer. Federal law requires rear guards but does not yet require side guards, which can make side underride cases more complex to prove.
How Long Do I Have to File a Truck Underride Lawsuit in Louisiana?
You have two years from the date of the crash to file a personal injury lawsuit in Louisiana, following a change in the law that took effect on July 1, 2024. Because evidence in truck cases disappears quickly, it is best to speak with a lawyer as soon as possible.
Who Can Be Held Liable for a Missing or Defective Underride Guard?
Depending on the facts, the trucking company, a maintenance provider, or the guard’s manufacturer may be held liable. A missing, worn, or defectively designed guard can point to negligence by whoever was responsible for installing, maintaining, or building it.
What Should I Do After a Fatal Truck Underride Crash?
Focus first on your family, then speak with an attorney before dealing with the trucking company’s insurer. An experienced lawyer can preserve evidence and handle the wrongful death claim so you are not negotiating during the hardest moment of your life.
How Much Does It Cost to Hire a Baton Rouge Underride Accident Lawyer?
Nothing up front. Dudley DeBosier works on a contingency fee, so you pay us nothing unless we recover money for you, and your first consultation is always free.
Contact Our Baton Rouge Underride Accident Lawyers
If you or a loved one was hurt in a truck underride crash in Baton Rouge, we are sorry for the heartbreak and loss you’re experiencing. We want to help and can’t stress enough just how important it is to reach out as soon as possible. Evidence can vanish, and deadlines can pass before you realize what is at stake. We know how the trucking companies build their defense, and we know how to push back.
Contact Dudley DeBosier today for a free, confidential consultation. We are here to listen, and we are ready to fight for you.
