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Truck and 18-Wheeler Accident Liability in Texas: The Statutory Framework Behind Commercial Vehicle Claims

By Accident Atlas Editorial Team · Reviewed by Phil Ayres · Updated July 12, 2026 · 9 min read

The Legal Structure Governing Commercial Truck Liability in Texas

When a collision involves an 18-wheeler or other commercial vehicle in Texas, liability analysis does not rest on a single statute. It draws on three interlocking parts of the Transportation Code, each contributing a different layer to the claim. Chapter 545 governs the operation and movement of vehicles on Texas roadways, including speed and following-distance rules. Chapter 601 is the Motor Vehicle Safety Responsibility Act, which sets financial responsibility and insurance requirements. Chapter 644 establishes commercial motor vehicle safety standards, including the relationship between state and federal trucking regulations.

Each chapter answers a different question in a liability case: Chapter 545 helps prove that a driver violated a specific rule of the road; Chapter 601 helps establish whether adequate insurance exists to pay a claim; and Chapter 644 helps show that a commercial safety standard was breached. Identifying which chapter governs a given fact pattern is often the first step in determining what evidence to gather after a wreck involving a commercial truck.

Federal vs. State Regulation: Which Rules Control an Interstate Trucking Accident

Because many commercial trucks cross state lines, a threshold question in any trucking case is whether federal or state safety law controls. Under §644.002, a federal motor carrier safety regulation prevails over a conflicting Texas Transportation Code provision when the truck is operated in interstate commerce. The rule flips for trucks operating purely intrastate: a rule adopted by the Texas director under Chapter 644 prevails over a conflicting federal regulation in that context.

A state safety rule adopted under Chapter 644 also prevails over any conflicting rule adopted by a local government, meaning a city or county cannot impose its own trucking ordinance that overrides state safety standards. Section 644.051 authorizes the Texas director to adopt rules regulating the safe transportation of hazardous materials and the safe operation of commercial motor vehicles, but those rules must remain consistent with federal safety regulations. The director may also adopt federal safety regulations by reference, which is why many Texas commercial trucking cases are ultimately litigated under federal standards even though the underlying claim is a matter of state law.

Insurance and Financial Responsibility Requirements for Commercial Trucks

Texas's Motor Vehicle Safety Responsibility Act, found in Chapter 601, sets the baseline insurance requirements relevant to any commercial truck claim. Under §601.071, a motor vehicle liability insurance policy must be an owner's or operator's policy issued by an insurer authorized to write motor vehicle liability insurance in Texas, and it must be written to or for the benefit of the named insured.

Where a bond or insurance policy is used to satisfy financial responsibility requirements, §601.168 requires that it be issued by an authorized surety or insurance company and that it cover the amounts required to establish financial responsibility under §601.072. Proof of coverage can also be established by filing an insurer's certificate with the department under §601.083, which must state the policy's effective date along with other required details.

The standard proof of motor vehicle liability insurance form prescribed by the Texas Department of Insurance, described in §601.081, must include the insurer's name, the policy number, the policy period, the name and address of each insured, and either the policy limits or a statement that coverage complies with the minimum amounts required by the chapter. These documentation requirements give claimants a clear paper trail for confirming that a trucking company's coverage was valid at the time of a crash.

Recovering After a Crash: Relief from License/Registration Suspension Using Insurance Proof

A person facing suspension of a driver's license, vehicle registration, or nonresident operating privilege under §601.332 following a collision is not without recourse. Under §601.333, that person can file evidence that a motor vehicle liability insurance policy covering the vehicle involved was in effect at the time of the collision, along with supporting documents such as the original policy or a certified copy.

An affidavit can also be used as part of this relief process, stating that the person was insured at the time of the collision and that the insurance company is liable to pay any resulting judgment. This mechanism gives both trucking companies and injured claimants a documented path to establish or verify coverage tied to the specific collision at issue.

Speed and Following Distance Rules That Establish Trucker Fault

Texas law treats speed above the limits set in §545.352(b) as prima facie evidence that the speed was not reasonable and prudent and was therefore unlawful. This statutory presumption is directly relevant to establishing negligence in a truck crash, since it shifts the practical burden to the defendant driver or carrier to rebut the presumption of unreasonable speed.

Following distance is addressed separately in §545.062, which requires every operator following another vehicle to maintain an assured clear distance sufficient to stop safely without colliding, taking into account speed, traffic, and highway conditions. Truck drivers face an additional, more specific rule under §545.062(b): an operator of a truck or a vehicle drawing another vehicle, while on a roadway outside a business or residential district and following another truck or towing vehicle, must leave sufficient space, conditions permitting, so that a passing vehicle can safely enter and occupy that space.

Together, these provisions give plaintiffs' counsel statutory benchmarks for arguing that a truck driver violated a specific, codified rule of the road, rather than relying solely on a general negligence standard.

Criminal Liability for Trucking Safety Violations and Its Role in Civil Claims

Section 644.151 makes it a criminal offense to violate a rule adopted under Chapter 644, to refuse an inspection authorized under §644.104, or to knowingly operate—or assign a driver to operate—a commercial motor vehicle in violation of a federal out-of-service order issued under 49 C.F.R. §385.13(d)(1). Violations tied to an out-of-service order carry escalating penalties, up to a felony of the second degree if the vehicle was involved in a collision resulting in death.

Notably, this criminal exposure extends beyond the driver: it also applies to those who own, lease, or assign a driver to a truck operated in violation of an out-of-service order. That detail is significant in civil litigation because it helps identify potentially liable trucking companies or fleet owners, not just the individual behind the wheel. Evidence of a criminal citation or an out-of-service violation tied to the crash can support a civil claim by demonstrating that the carrier or driver violated an established safety rule.

Commercial Truck Parking in Residential Areas and Related Liability Exposure

Section 545.307 regulates the overnight parking of a commercial motor vehicle in or near a residential subdivision. It uses the same commercial motor vehicle definition found in §522.003, as well as road tractors, truck tractors, pole trailers, and semitrailers as defined in §541.201. Notably, the statute applies this definition regardless of whether the vehicle is being used for a commercial purpose at the time.

Under this section, after 10 p.m. and before 6 a.m., a person may not park a commercial motor vehicle on a qualifying street within or adjacent to a residential subdivision where signage prohibiting such parking has been posted, subject to an exception for vehicles actively transporting persons or property to or from the subdivision or performing work there. This provision becomes relevant when an improperly parked truck or trailer in a residential subdivision contributes to a collision, since it establishes where such vehicles are legally permitted to be located overnight.

Automated (Self-Driving) Commercial Trucks and Existing Liability Rules

Section 545.458 confirms that an automated motor vehicle meeting the definition of a commercial motor vehicle under §644.001 must operate in accordance with Subtitle F and any other applicable state or local laws governing commercial motor vehicle operation. The statute carves out an exception only for provisions that, by their nature, reasonably apply solely to a human driver.

In practical terms, this means the existing commercial vehicle safety statutes and liability-relevant rules discussed throughout this article are not bypassed simply because a truck is operated through automated driving technology. For accident claims involving autonomous or partially autonomous commercial trucks, the same statutory framework covering following distance, speed, insurance, and safety rules remains the starting point for analysis.