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Jared J. Pehrson | May 30, 2026 | Truck Accidents
Updated 2026
You were hit by a commercial truck in Arizona. The vehicle that hit you was a semi, a box truck, a tanker, a dump truck, or some other rig over 10,000 pounds operating in commerce. That single fact changes almost everything about your case compared to a regular car accident.
This page explains what makes Arizona truck accident cases different, who can be held liable beyond the driver, why the federal commercial coverage rules matter to your recovery, and the time-sensitive evidence steps that have to happen in the first days, not the first months. If you’re trying to figure out whether you need an Arizona truck accident lawyer or whether your auto insurance claim is enough, this is the read.
A car-on-car crash is usually one driver versus another driver, with two insurance policies and a police report. A truck case is rarely that clean.
Commercial trucks operate under a federal regulatory layer that doesn’t apply to passenger vehicles. The Federal Motor Carrier Safety Administration (FMCSA) sets rules on driver hours, drug and alcohol testing, vehicle inspections, cargo securement, driver qualification, and electronic logging. Violations of those rules are evidence of negligence and, when paired with a serious crash, often evidence of conduct that supports added claims against the carrier itself.
Three things shift the moment a commercial truck is involved:
Truck cases are also more serious, on average, because of basic physics. An 80,000-pound combination vehicle hitting a 4,000-pound sedan produces injuries that trend toward catastrophic: spinal fractures, traumatic brain injuries, internal organ damage, amputations, wrongful death. That severity is one reason truck cases value differently than the average car claim. It’s also why corporate defense counsel for the trucking company often shows up before the injured person has finished a first ER visit.
In a car accident, the at-fault driver is usually the defendant, and their auto insurance is the source of recovery. In a truck case, multiple parties can be on the hook, and naming the right ones is often the difference between a low policy ceiling and reaching real coverage.
The truck driver. The direct actor. If the driver was speeding, distracted, fatigued, intoxicated, or violating an FMCSA rule, they’re a defendant.
The motor carrier (trucking company). Under the doctrine of respondeat superior in Arizona tort law, an employer is liable for an employee’s negligent acts committed within the scope of employment. If the driver was on a load, the carrier is generally on the hook for the driver’s conduct. Beyond vicarious liability, carriers can be directly liable for negligent hiring, negligent training, negligent supervision, negligent retention, and negligent maintenance of the truck.
The broker. A freight broker arranges loads between shippers and carriers. Brokers have a duty to vet the carriers they hire. Pairing a load with a carrier that has a documented history of safety violations can support a negligent-selection claim against the broker.
The shipper. The party that owned the freight. Shipper liability often turns on cargo. If the shipper improperly loaded or secured cargo that shifted and caused the crash, the shipper can be a defendant.
The cargo loader. Sometimes a separate company loads the trailer. If improper loading caused a rollover or a load-shift crash, the loader has exposure.
The maintenance contractor. Many carriers outsource maintenance. If a brake failure or steering failure stems from a botched repair, the maintenance shop can be liable.
The truck or component manufacturer. Defective tires, brakes, steering components, or coupling systems open a products liability claim against the manufacturer.
Identifying every viable defendant early matters because each one carries its own insurance. A serious injury case that maxes out one policy can still be made whole if the right additional defendants are named.
This is one of the biggest practical reasons truck cases are valued and negotiated differently than car cases.
Under 49 CFR § 387.9, motor carriers operating commercial vehicles of 10,001 pounds or more in interstate commerce must carry substantially more liability coverage than ordinary passenger drivers. The regulation sets specific minimum financial responsibility levels for general freight, with significantly higher requirements for oil and certain hazardous materials. Many carriers voluntarily carry primary coverage well above the federal floor, with excess and umbrella layers stacked on top.
Compare that to Arizona’s minimum auto liability: $25,000 per person and $50,000 per accident. A garden-variety car accident often runs into a ceiling problem where damages exceed the at-fault driver’s policy. Truck cases rarely have that problem at the low end. The ceilings are higher, sometimes much higher.
What this means in practice:
The point: just because higher coverage exists doesn’t mean the insurer hands it over. The coverage being there is the start, not the end.
Driver fatigue is a common cause of serious truck crashes, and federal law sets specific limits to prevent it.
Under 49 CFR § 395.3, a property-carrying commercial driver may drive a maximum of 11 hours after 10 consecutive hours off duty, and may not drive beyond the 14th consecutive hour after coming on duty. Additional limits cap weekly driving at 60 hours over 7 days or 70 hours over 8 days, depending on the carrier’s schedule.
When a driver violates Hours of Service rules, two things happen in a civil case:
Proving an HOS violation requires the driver’s logs, which since 2017 have generally been required to come from an electronic logging device. Which leads to the most time-sensitive piece of any truck case.
Under 49 CFR § 395.8, most commercial drivers are required to record duty status on an electronic logging device. The ELD captures driving time, on-duty time, location, engine hours, vehicle movement, and miles driven. Many modern trucks also have separate engine control module (ECM) data that records speed, braking, throttle position, and seatbelt use in the seconds before a crash. A growing number of carriers also run dashcams that record forward-facing and driver-facing video.
This data is the heart of a serious truck case. It can also disappear.
Under FMCSA rules, carriers are required to retain driver records of duty status (the ELD log data) for a defined limited period after the date of the record, and ECM data can be overwritten as the truck keeps operating. Dashcam footage often runs on rolling storage that overwrites within days unless flagged. The exact retention windows are set by FMCSA regulation and should be confirmed against the current rule text in any given case, but the practical point is the same: these records do not last forever and the rolling-storage video can disappear in a week.
That’s why a spoliation letter, also called a preservation letter, has to go out fast. It’s a formal written demand to the carrier and its insurer identifying every category of evidence to be preserved: ELD data, ECM downloads, dashcam footage, driver qualification file, drug and alcohol test results, dispatch records, maintenance records, and the truck itself for inspection. Once the letter is in, destroying covered evidence exposes the carrier to court sanctions and to a jury instruction allowing the jury to infer the destroyed evidence would have been bad for the carrier.
This is the single biggest practical reason “wait and see” is the wrong move in a truck case. Wait three weeks and the dashcam loop may have overwritten itself.
Truck crashes in Arizona track national patterns, with some local flavor.
Most serious crashes have more than one cause. A tired driver going too fast in a truck with worn brakes is three liability theories, not one.
If you live and drive in Arizona, the geography is familiar. Some corridors carry disproportionate truck traffic and disproportionate truck crashes.
Local geography matters because it tells us where to look for witnesses, surveillance camera footage, and whether a particular carrier runs the corridor often enough to have a documented history we can subpoena.
Arizona is a pure comparative negligence state under A.R.S. § 12-2505. That means recovery is reduced by the plaintiff’s percentage of fault, but recovery is allowed even if the plaintiff is 99 percent at fault. Most states are not that generous.
The formula:
Total damages × (100% − plaintiff’s fault percentage) = recovery
A driver is stopped at a red light on Grand Avenue at 35th Avenue. A long-haul carrier’s tractor-trailer fails to stop in time and rear-ends them. The police investigation assigns 100 percent fault to the truck driver, and the ELD data later shows the driver had been on duty for 13 hours. Total damages are calculated at a hypothetical $400,000.
Recovery: $400,000 × (100% − 0%) = $400,000
A driver is changing lanes on I-10 westbound near 51st Avenue. A semi-truck in the adjacent lane drifts during the lane change and the vehicles collide. After investigation (including the truck’s ECM data showing the driver was looking at a tablet), fault is apportioned 70 percent to the trucking company and 30 percent to the driver for an aggressive lane change. Same hypothetical damages of $400,000.
Recovery: $400,000 × (100% − 30%) = $280,000
That $120,000 reduction is exactly why the carrier’s defense team and adjuster will push to pin partial fault on you. Every percentage point assigned to the plaintiff is real dollars removed from the recovery. This is also why a recorded statement to the trucking company’s adjuster in week one is dangerous. Casual phrasing (“I guess I could have looked twice”) gets pulled out months later to anchor a fault percentage.
These are illustrative math examples only, not predictions about any specific case. For a fuller walkthrough, see Arizona’s pure comparative negligence rule.
Every Arizona personal injury claim splits damages into two categories.
Economic damages are the quantifiable financial losses. In truck cases, they often run higher than in car cases because the injuries trend more severe.
Future medical costs are where truck cases especially diverge from car cases. Catastrophic injuries from a commercial truck collision can mean decades of treatment. Under the Arizona Rules of Evidence, projecting future medical care generally requires expert medical testimony. A treating physician or a life-care planner has to put numbers on paper. Adjusters routinely discount future care when it isn’t supported by that kind of expert proof, which is why building out the future-care record early is part of how a truck case gets evaluated correctly.
Non-economic damages cover the human cost.
Arizona’s constitution (Article 2, Section 31) prohibits statutory caps on damages for injury or death. A jury can award what it decides pain and suffering is worth, and the legislature can’t take it back. For catastrophic truck injuries, this matters a lot. Non-economic damages in a serious case can exceed economic damages by a wide margin, and Arizona law doesn’t get in the way.
In truck cases, punitive damages in Arizona come up more often than in car cases because of the conduct patterns. Driving under the influence, deliberate HOS violations, knowingly putting an unsafe truck on the road, or pressuring a driver to skip required rest can support the “evil mind” standard required under Linthicum v. Nationwide. When punitives are on the table, they can dwarf compensatory damages.
Trucking companies and their insurers are sophisticated, repeat-player defendants. When the insurer unreasonably denies, delays, or undervalues a clearly covered claim, Arizona recognizes a separate tort claim for insurance bad faith under Rawlings v. Apodaca and its progeny. Damages can include contract damages plus consequential damages and, in egregious circumstances, punitive damages.
Bad faith doesn’t only come up in first-party UM/UIM disputes. It comes up in commercial trucking matters when the carrier’s insurer plays games with a clearly liable case, ignores reasonable settlement demands within the policy limits, or violates its duty to defend.
If a lawyer says on the first call exactly what a truck case is worth, walk away. They don’t know yet.
Here’s what nobody knows on day one:
What we can do on day one is name the variables that move the number, send the preservation letter to protect the evidence, and explain what to do (and not do) over the next 90 days to protect the case. That’s what a real free case review looks like. Calculator widgets and “every case is different” non-answers are both cop-outs. Truck cases are different in ways that can be named.
If you’re reading this within days of the crash, this is the practical list.
Under A.R.S. § 12-542, you have two years from the date of the crash to file a personal injury lawsuit in Arizona. The clock does not stop because you’re still treating, still negotiating with the insurer, or still figuring out who all the defendants are. If a government entity is involved (a municipal truck, a state vehicle), a 180-day notice of claim deadline applies on top of the two-year window under A.R.S. § 12-821.01.
Usually both, and often more. Under respondeat superior, the trucking company is
