Most people sharing the road with 18-wheelers have no idea that commercial trucks operate under an entirely separate set of rules than regular passenger vehicles — rules that go well beyond a standard driver’s license and basic traffic law. That gap in knowledge matters, because when something goes wrong on a Texas highway involving a commercial truck, those rules determine who’s liable, what evidence gets preserved, and how much a case is ultimately worth. Whether you drive a car, a pickup, or a commercial vehicle yourself, understanding the basics of Texas trucking law puts you in a significantly better position if you’re ever involved in a crash.
This is the first thing most people get wrong: they assume trucking is just a state issue. It’s not. Commercial motor vehicles operating in Texas are subject to a dual layer of regulation — Texas Transportation Code on the state side, and Federal Motor Carrier Safety Administration (FMCSA) rules on the federal side.
Texas Transportation Code § 522 governs commercial driver’s licenses (CDLs) in Texas, setting out the classifications, endorsements, and disqualification rules that apply to anyone operating a commercial motor vehicle. A standard Class C driver’s license does not authorize someone to operate an 18-wheeler — and a driver behind the wheel of a commercial truck without the proper CDL classification is an immediate red flag for negligence in any crash investigation.
On the federal side, 49 C.F.R. Parts 380–399 cover everything from driver qualifications and hours of service to vehicle inspections and hazardous materials transport. These federal rules apply to any truck crossing state lines — which covers the vast majority of commercial traffic on Texas interstates like I-35, I-20, and I-10.
When a trucking company or driver violates either set of rules and a crash results, those violations become evidence of negligence. Texas courts have consistently held that violation of a safety statute is relevant to establishing breach of duty in a personal injury case.
Driver fatigue is one of the leading causes of serious truck accidents. Federal regulations under 49 C.F.R. § 395.3 set strict limits on how long a commercial driver can operate a vehicle before mandatory rest:
These aren’t suggestions. They’re federal law, and trucking companies are required to track compliance through electronic logging devices (ELDs) under 49 C.F.R. § 395.8. ELD data is one of the first things an attorney requests after a serious truck crash — it shows exactly when and how long the driver was operating, and whether the company was aware of violations.
The problem is that ELD records, paper logs, and dispatch data only have to be retained for six months under federal rules. After that, they can be legally discarded. If you’re involved in a crash with a commercial truck, this is one of the strongest arguments for contacting an attorney quickly — a legal preservation letter can freeze that evidence before it disappears.
Texas has some of the most heavily used freight corridors in the country, and the state takes commercial vehicle weight and safety compliance seriously — at least on paper.
Texas Transportation Code § 621 sets the weight limits for commercial vehicles on Texas roads. The standard maximum is 80,000 pounds gross vehicle weight for most vehicles on Interstate highways. Overweight vehicles cause disproportionate road damage and are significantly harder to stop — which is directly relevant in crash scenarios involving brake failure or extended stopping distances.
Cargo securement is governed federally under 49 C.F.R. Part 393, which sets detailed standards for how different types of freight must be tied down, blocked, and braced. Improperly loaded cargo that shifts during transit can cause catastrophic loss of vehicle control — rollovers, jackknifes, and sudden lane departures — and the liability for that shifts to whoever loaded the truck, not necessarily the driver.
Pre-trip and post-trip vehicle inspections are required under 49 C.F.R. § 396.13 — every driver must inspect their vehicle before and after each trip and report defects in writing. Trucking companies are required to maintain those inspection records. When a crash is caused by a known mechanical defect — worn brakes, bald tires, faulty coupling — and the inspection records show the problem was already documented, the company’s liability exposure increases substantially.
Understanding trucking regulations is one thing. Understanding how Texas law turns those violations into compensation is another.
Texas uses a modified comparative fault system under Texas Civil Practice & Remedies Code § 33.001. If you’re involved in a crash with a commercial truck, your compensation is reduced by your percentage of fault — but only eliminated entirely if you’re found more than 50% responsible. This means that even partial fault on the truck driver’s side — a log violation, a failed inspection, an overweight load — translates into real recovery for the injured party.
When a trucking company’s conduct goes beyond ordinary negligence into something more reckless — knowingly dispatching a fatigued driver, ignoring repeated safety violations, falsifying inspection records — Texas law allows for exemplary damages under Texas Civil Practice & Remedies Code § 41.003. These are punitive damages designed to punish behavior that shows conscious indifference to the safety of others on the road.
One more thing worth knowing: Texas has a two-year statute of limitations for personal injury claims under Texas Civil Practice & Remedies Code § 16.003. That clock starts on the date of the accident. Missing it means losing your right to sue entirely, regardless of how clear the liability is.
Do Texas trucking laws apply to out-of-state trucking companies operating in Texas? Yes. Any commercial motor vehicle operating on Texas roads — regardless of where the company is headquartered — must comply with both Texas Transportation Code requirements and applicable federal FMCSA regulations. Out-of-state carriers are not exempt, and their insurance policies are required to meet minimum coverage thresholds set by federal law.
What’s the difference between a trucking violation and actual negligence in a Texas lawsuit? A regulatory violation — like exceeding hours-of-service limits or skipping a required inspection — is strong evidence of negligence, but it doesn’t automatically create liability on its own. Texas courts look at whether the violation was a proximate cause of the crash and the resulting injuries. An experienced attorney will connect the specific violation to the specific harm to build that causation argument.
Can a truck driver be personally sued in addition to the trucking company? Yes. In Texas, both the driver and the employer can be named as defendants in the same lawsuit. The driver may face personal liability for their own negligent conduct, while the company faces liability under respondeat superior (vicarious liability) and potentially for its own direct negligence in hiring, training, or supervision. Under Texas Civil Practice & Remedies Code § 33.013, each defendant pays their proportionate share — unless one is found more than 50% at fault, triggering joint and several liability for economic damages.
Texas trucking law is complicated by design — there are dozens of overlapping state and federal regulations, multiple potential defendants, and strict evidence deadlines that most people don’t know exist until it’s too late.
If you were injured in a crash involving a commercial truck in the Dallas area, visit our Dallas Truck Accident Attorneys page to understand how these regulations apply to your case and what your legal options look like.
No cost to talk. No obligation. And the sooner you start, the more of that critical evidence still exists.
The content on this page is intended for general informational purposes only and does not constitute legal advice. No attorney-client relationship is formed by reading this material. Laws vary by jurisdiction and change over time — consult a licensed Texas attorney for advice specific to your situation.