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Who is Liable in a Truck Accident?

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Posted on April 10, 2025 in

If a commercial truck collides with you, more people or entities could be liable than just the driver, such as the business that owns the truck and the truck’s manufacturer. In this post, we consider some of the unique characteristics of commercial truck accident liability in Arizona, how it can affect you, and what to do if you are involved in a commercial truck accident.

If you or a loved one were involved in a truck accident, please call Stone Rose Law at (480) 498-8998 or use our contact form so we can help you receive the compensation you deserve.

Who May Be a Liable Party in a Commercial Truck Accident?

Who you might seek compensation from after a commercial truck accident will depend on who can be held responsible for causing it. This chain of responsibility often draws in multiple possible defendants.

An infographic describing who may be liable in a commercial truck accident.

The Driver of the Truck

The role of the truck driver is the starting point of any commercial truck accident claim investigation. A plaintiff’s personal injury lawyer will consider whether the truck driver acted negligently, recklessly, or even intentionally in contributing to the crash.

Examples of truck driver negligence include:

  • Speeding
  • Distracted driving
  • Failing to heed traffic signs and signals
  • Driver fatigue
  • Improper loading or securing of vehicle cargo

If you are not the at-fault party in a commercial truck accident, the truck driver will be the easiest culpable person to identify. However, the commercial driver will usually not be a good candidate to pay for the severe injuries you might receive in a truck accident.

Therefore, a good truck accident law firm will always look deeper into the accident facts to find others who might share responsibility.

The Trucking Company

After truck drivers, truck owners are commonly identified defendants in commercial truck accident cases.

Even though the business that owns the truck has delegated authority to operate the truck to the driver, in most cases, it cannot escape responsibility for that driver getting into a crash.

Arizona law refers to the owner’s vicarious liability as “agency liability.” As an employee, the driver serves as an agent of the truck’s owner, meaning that the owner is still usually responsible for harm caused by the owner’s truck.

Even if the driver acts recklessly or intentionally in causing the accident, the trucking company can still be held at least partly responsible if a personal injury attorney can show that it was negligent in hiring, training, or supervising the dangerous driver.

In addition to properly vetting, hiring, and managing the driver, the trucking company is also responsible for maintaining the truck in good working order. So, for example, if poor truck maintenance leads to a brake failure, and that brake failure was a contributor to the truck accident, this is a liability connection to the trucking company.

Truck companies subject to the trucking regulations of the Federal Motor Carrier Safety Administration (FMCSA) can also be liable for failing to comply with those regulations, including motor vehicle safety standards, the maximum number of hours drivers are permitted to be behind the wheel, and workplace alcohol and drug testing programs.

Third-Party Vendors and Contractors to the Trucking Company

Many commercial truck owners often hire other individuals and companies to do work on their trucks. These third parties may perform services including:

  • Vehicle maintenance
  • Recruiting and training drivers
  • Cargo loading and unloading

If any of these third parties act negligently in performing their roles, and that negligence contributes to the truck accidents, then legal responsibility can be attached to them.

If we return to our defective brake example above, let’s say the trucking company hires an automotive maintenance service to do brake repairs on a truck; however, that service is performed carelessly, causing the brakes to fail. This makes the maintenance provider partly responsible for causing the accident. The same applies to not changing truck tires frequently enough, resulting in tire blowouts.

Or, if the trucking company hires a contractor to load a semi-trailer but that contractor does so negligently, causing a rollover accident due to a load shift that damages your vehicle, this is another possible third-party liability connection.

The Truck Manufacturer and Seller

Another source of third-party liability can be if the truck manufacturer or supplier of a component that is part of the truck’s manufacture was so careless in the design or construction of the truck or component that it made the truck unreasonably dangerous for its intended purpose.

This is known as product liability.

Again, let’s consider the defective brake example: if the reason why the brakes failed before the truck accident was not because of poor maintenance but rather because of poor design or manufacture that led to the failure even when the driver applied the brakes properly, this could be an example of product liability.

Two important considerations in product liability claims are:

  • Product liability extends to everyone involved in providing the inherently defective product, including the poorly designed brake component maker, the truck manufacturer that included the defective brake system into its trucks, and the company that sells the defective truck to the trucking company.
  • Product liability is strict liability. What this means is that if your personal injury lawyer can show that the truck was inherently unsafe as designed or built for its intended purpose, then there is no defense against liability.

Drivers or Other Parties Aside from the Truck Driver

Let’s say a semi-tractor truck driver is texting while driving, and this causes the driver to go slower than the speed limit. Another driver behind the truck becomes angry as a result, and engages in negligent or even reckless behavior that involves passing the truck, cutting sharply in front of it, and then “brake checking” the truck driver.

The truck driver slams on the brakes to avoid a collision with the brake-checking driver, and loses control over the truck in the attempt, causing the truck to jackknife, and this results in a collision between your car and the truck trailer.

In this case, the brake-checking driver is also a potentially liable defendant in your truck accident claim.

Or, if a “dead-walking” pedestrian (someone looking intently at a phone screen instead of paying attention to his or her surroundings) negligently crossed the road right in front of the truck causing the same accident result, that pedestrian is another potentially liable third party.

Responsible Government Agencies

Government agencies are responsible for ensuring that public streets and highways are safely designed and maintained. If the agency responsible for road maintenance lets a stretch of highway deteriorate to the point where it becomes unsafe to drive on, and this contributes to a commercial truck accident, then that agency can possibly be held liable.

If the government agency hired a contractor to do the maintenance and repair work on that stretch of highway, and the contractor did the work negligently, then that contractor can also be held accountable in the chain of potential liability.

Who Might be Liable for Your Commercial Truck Accident Claim?

When we put it all together, the chain of responsibility for a truck accident can become almost nightmarishly complex:

  • A fatigued semi-truck driver drives too slowly, sparking a “road rage” brake-checking incident with another driver;
  • The truck driver was fatigued because his trucking company employer was cutting corners with FMCSA driver work hours regulations, and he was not getting enough rest;
  • The truck driver reacts too slowly, slamming on the brakes too late to avoid the brake-checking driver;
  • The truck’s brakes fail because they were inherently defective in their design, and the truck manufacturer built inherently defective brakes into its truck that the truck distributor sold to the trucking company;
  • The last-second, sudden braking attempt causes the truck’s load to shift because it was improperly loaded by a contractor the trucking company hired, causing the trailer to tip over; and
  • All of this occurs on a poorly maintained stretch of road.

Can you count the number of possible businesses, government actors, and individuals involved here?

Get an Experienced Truck Accident Attorney from Stone Rose Law

The legal process with truck accidents differs in significant ways from car accidents that involve only passenger cars:

  • As we have shown, proving liability for all the directly responsible parties and other third parties takes thorough investigation into the facts leading up to and contributing to the truck crash.
  • The injuries you can suffer in the immediate aftermath of a collision with a large commercial truck can be much more serious than if you collide with another passenger vehicle. In the worst case, the collision could result in the wrongful death of a loved one.
  • Both federal and Arizona laws and regulations may apply, you could be dealing with both negligence-based and strict liability theories of tort law, and several parties can come from multiple legal jurisdictions.
  • If a government agency is a potential defendant, you could be facing a 180-day time limit to notify it of your legal claim, a much shorter time period than the ordinary two-year statute of limitations for a personal injury case.
  • You could easily find yourself with legal claims against multiple parties and having to negotiate settlements with multiple insurance companies and defense attorneys.

This is why, if you have been the victim of a commercial truck accident in Arizona, you need representation from an experienced truck accident attorney at Stone Rose Law.

Our personal injury lawyers are experienced, skilled negotiators who will not let insurance companies lowball you on settlement offers so you get less than the maximum compensation you deserve. And if negotiations do not work, we are highly experienced trial court litigators who will represent you on a contingency basis.

Call us at (480) 498-8998 to speak with an experienced truck accident attorney and set up a free case evaluation. You can also contact us online to ask a question or schedule a free consultation.