After a collision with an 18-wheeler on a Dallas highway, most people assume the truck driver caused the crash and that the driver is who they’ll pursue for compensation. That assumption is understandable. It’s also incomplete. Texas law doesn’t ask who was present or who violated a rule. It asks whose conduct was a substantial factor in causing the harm, and the answer often involves more than one party.
At Marchand Law, our background shapes how we approach these cases. Our attorneys bring over 25 years of experience alongside professional backgrounds in nursing and engineering. That combination matters in commercial truck cases, where establishing liability requires more than collecting paperwork. It requires understanding crash mechanics, vehicle systems, and injury causation at a level that connects technical evidence to a legal standard.
What follows is an honest explanation of how Texas law assigns responsibility in truck accident cases, who the potential defendants are, and why being involved in a crash isn’t the same as being legally responsible for it.
Multiple Parties Can Share Responsibility
A Texas truck accident claim can name more than one financially responsible party at the same time. The driver, the motor carrier, a cargo loading company, a maintenance contractor, and a parts manufacturer can all carry a share of liability within a single case. Identifying every potentially responsible party isn’t just thorough. It determines which insurance policies and coverage limits are available to a claimant, and those can differ dramatically between a small owner-operator policy and a large commercial fleet carrier’s coverage.
Responsibility can’t be assigned from a checklist. A thorough review of driver qualification files, carrier safety records, vehicle maintenance histories, and operational data is necessary before any party’s role in the crash can be established with confidence.
The Driver & the Motor Carrier
These two are the most common defendants in commercial truck cases, and their liability often runs on parallel tracks.
Under the doctrine of respondeat superior, a motor carrier is vicariously liable for what its driver does behind the wheel when acting within the scope of employment. That means a claimant can reach the carrier’s insurance without proving a separate wrongful act by the company itself. The driver’s negligence alone is enough to trigger the carrier’s responsibility.
Motor carriers also face direct liability on independent grounds. Negligent hiring occurs when a carrier puts a driver on the road despite a history of violations or disqualifying conduct. Negligent training and negligent supervision apply when a carrier fails to ensure drivers understand and follow hours-of-service requirements or safe operation procedures. Failure to maintain a vehicle in roadworthy condition is another basis for holding the carrier accountable.
When a motor carrier leases a truck from an owner-operator, Texas law treats the carrier as having exclusive control of the equipment for the duration of that lease. The carrier is responsible for both the vehicle and the driver as if the arrangement were full employment.
Cargo Loaders, Brokers, Maintenance Contractors, & Manufacturers
Liability in commercial truck crashes extends well beyond the cab. Several categories of third parties carry exposure depending on their role in the chain leading to the collision.
Cargo-Related Liability
Federal regulations under 49 C.F.R. Part 393 set specific requirements for how freight must be secured and distributed across a trailer. When a load shifts during transit and causes a driver to lose control, a shipper, freight broker, or loading company that failed to meet those securement standards can share responsibility for the resulting crash. Documentation (cargo manifests and loading records) matters as much here as the physical condition of the freight itself.
Maintenance Contractors
Trucking companies routinely outsource brake service, tire maintenance, and federal safety inspections to third-party contractors. When a brake failure or tire blowout traces back to a contractor’s inadequate work, that contractor carries liability alongside the carrier. Determining whether a mechanical failure was preventable through proper maintenance is where engineering-level analysis becomes essential, not just a review of the work order.
Parts Manufacturers
Not every crash originates with human error. When a defective component causes the collision, the manufacturer of that part can face product liability exposure under Texas law. Faulty brakes, defective steering systems, tire failures, and inadequately designed underride guards have all formed the basis of product liability claims in Texas truck accident cases.
Why Being Involved Isn’t the Same as Being Liable
Texas law requires more than proof that a defendant was present, violated a regulation, or contributed to the general circumstances of a crash. It requires proof that the defendant’s negligence was a proximate cause of the injury, specifically, a substantial factor in bringing about the harm. A rule violation that didn’t actually contribute to how the crash unfolded doesn’t create liability, even if it looks bad on paper.
The Texas Supreme Court made this concrete in its June 27, 2025 ruling in Werner Enterprises, Inc. v. Blake. The Court reversed a judgment of over $89 million against a trucking company and its driver, holding that their conduct wasn’t a substantial factor in causing the plaintiffs’ injuries. The Court found that the sole proximate cause was the loss of control by a third-party driver who crossed the highway median. The decision reinforced that an employer can’t be held liable under either vicarious or direct liability theories when the employee’s conduct doesn’t satisfy the proximate cause requirement. Werner is the most significant recent precedent narrowing when carriers and drivers can be held responsible for highway crashes, and it shifts the analytical weight firmly toward causation rather than fault in the abstract.
For a claimant, this means that identifying a defendant who broke a rule is only the first step. The harder work is demonstrating a direct causal connection between that conduct and the specific injuries at issue.
How Comparative Fault Affects Your Recovery
Texas uses a modified comparative negligence system governed by Chapter 33 of the Texas Civil Practice and Remedies Code. Under Section 33.001, a claimant can’t recover any damages if their share of responsibility exceeds 50 percent. At 51 percent or more, recovery is barred entirely.
Below that threshold, recovery is reduced proportionally. A claimant found 30 percent at fault against a defendant found 70 percent at fault recovers 70 percent of total damages. Defense attorneys representing motor carriers and their insurers know this system well and will work to shift as much responsibility as possible onto the claimant to reduce or eliminate a payout.
There’s one important exception. When a single defendant is found more than 50 percent responsible, that defendant can be held jointly and severally liable for the full judgment when other defendants can’t satisfy their share. That exception carries real weight in cases with multiple defendants carrying unequal insurance coverage.
The Evidence That Determines Who Pays
Establishing causation requires specific categories of evidence, and the window for preserving some of it closes quickly after a crash on corridors like I-35E, I-30, I-20, or the President George Bush Turnpike. These are the primary evidence sources in a commercial truck liability case:
- Electronic logging device (ELD) data: Required under federal regulations since December 2017, ELDs automatically record a driver’s hours of operation, speed, and engine activity. This data can confirm or disprove compliance with federal hours-of-service rules, which cap driving at 11 hours following 10 consecutive hours off duty, limit the on-duty window to 14 hours per shift, and require a 30-minute rest break after 8 cumulative driving hours.
- Maintenance records: Service logs, inspection reports, and repair orders establish whether the vehicle was in safe operating condition and whether known defects were addressed before the crash.
- Cargo documentation: Bills of lading and loading records show how the freight was prepared and whether securement standards under 49 C.F.R. Part 393 were followed.
- Driver qualification files: Employment applications, driving histories, prior violation records, and training documentation reveal whether the carrier exercised reasonable care in putting that driver on the road.
- Black box and telematics data: Event data recorders capture speed, braking, and steering inputs in the seconds before impact. This data is essential for reconstructing what actually happened mechanically.
Gathering documents tells part of the story. Interpreting the mechanical and physiological data within them tells the rest. Understanding how brake response times connect to stopping distances, or how fatigue affects reaction time at highway speeds, requires more than legal training. It’s the kind of analysis our backgrounds in nursing and engineering are built for.
Connecting the Evidence to Liability
Who pays after a truck accident isn’t determined by who broke the most rules. It’s determined by proving whose conduct actually caused the crash and the injuries that followed. That distinction shapes everything from which defendants are named to how much a claimant recovers once fault is apportioned.
If you or a family member were injured in a commercial truck collision in the Dallas area, Marchand Law can help evaluate the evidence and determine where liability actually lies. Reach us at (903) 345-1807.