A collision with a commercial truck is not a bigger version of a car accident. It is a categorically different event — in terms of the forces involved, the injuries that result, and the legal complexity of pursuing compensation. A fully loaded semi-truck weighs up to 80,000 pounds. A passenger vehicle weighs roughly 4,000. When those two objects collide at highway speed on the I-10, the Loop 101, or any of Phoenix's freight-heavy surface corridors, the outcome for the occupants of the smaller vehicle is almost always catastrophic.
Ian Duncan, personal injury attorney at Duncan Injury Group, explains why these cases require a different approach: "The moment a truck crash happens, the trucking company's response team is already moving. Their insurance carrier is notified, their defense attorneys are engaged, and their investigators may be at the scene before the victim has even left the hospital. The evidence that wins these cases — ELD data, black box recordings, maintenance logs, driver qualification files — has a short window before it's overwritten or 'unavailable.' If you don't have an attorney who knows what to demand and how to demand it, that evidence disappears."
This guide covers who is liable in a Phoenix truck crash, what federal regulations govern the trucking industry, what evidence must be preserved immediately, and what injured victims can realistically recover.
Why Truck Accidents in Phoenix Are So Deadly
Phoenix sits at the intersection of three major interstate corridors — I-10, I-17, and US-60 — making it one of the most heavily trafficked freight distribution hubs in the American Southwest. Goods moving between Los Angeles, Tucson, Albuquerque, Las Vegas, and the California ports flow through Phoenix daily. The city's role as a regional logistics hub means an outsized number of commercial trucks share its roads with passenger vehicles at all hours.
The Numbers Behind the Risk
According to the Federal Motor Carrier Safety Administration, Arizona recorded 2,750 crashes involving large trucks and buses in 2024, including 118 fatal crashes. Those crashes resulted in 144 deaths and 1,090 injuries statewide. The vast majority of those crashes occurred in Maricopa County — and the most dangerous concentration is in the Phoenix metro, where freight traffic, construction zones, and high-speed surface streets converge.
Why Crashes Are More Severe
Physics explains the injury disparity. A loaded tractor-trailer traveling at 65 mph requires up to 40% more stopping distance than a passenger car. At that speed, it takes roughly 525 feet — nearly two football fields — to come to a complete stop. A driver who is fatigued, distracted, or operating in violation of hours-of-service limits may not initiate braking until it is far too late. The result is underride collisions, override collisions, jackknife crashes, and wide-turn intersection impacts that leave passenger vehicle occupants with injuries far beyond what any standard car accident produces.
Who Can Be Held Liable — Beyond Just the Driver
This is the single most important distinction between a truck accident claim and a standard car accident claim. In a car crash, liability typically runs to the at-fault driver and, if applicable, their employer. In a commercial truck crash, the liability web is dramatically wider — and identifying every responsible party is directly tied to the total compensation available.
The Full Defendant Landscape
| Party | Basis for Liability | Evidence to Pursue |
|---|---|---|
| Truck Driver | Direct negligence: speeding, fatigue, distraction, impairment, traffic violations | ELD data, cell phone records, toxicology, driving history, citations at scene |
| Trucking Company | Respondeat superior (liable for employee drivers); negligent hiring, training, supervision, or retention of an unqualified driver | Driver qualification file, training records, prior disciplinary history, safety audit results |
| Cargo Loading Company | Improper loading causing load shifts, overweight cargo, unsecured freight that causes rollover or debris | Bills of lading, weight tickets, loading manifests, cargo securement inspection records |
| Truck Manufacturer / Parts Supplier | Defective brakes, tires, steering components, or other equipment that contributed to the crash | Maintenance logs, recall records, post-crash inspection reports, manufacturer defect databases |
| Maintenance Contractor | Negligent inspection or repair of the vehicle, especially brakes, tires, or lights | Third-party maintenance contracts, inspection records, work orders |
| Shipper / Broker | Pressure on driver to meet delivery deadlines that incentivized hours-of-service violations | Communications records, dispatch logs, delivery contracts, trip manifests |
| Government Entity | Defective road design, missing signage, inadequate lighting, or known hazards left unaddressed | ADOT maintenance records, prior incident reports, 180-day notice of claim required |
FMCSA Regulations and How Violations Win Cases
Commercial trucking in the United States is governed by a comprehensive federal regulatory framework administered by the Federal Motor Carrier Safety Administration. Every commercial truck operating in interstate commerce — including the vast majority of trucks on Phoenix's freeways — must comply with these regulations. Violations are not just infractions. In a personal injury lawsuit, a documented FMCSA violation is evidence of negligence per se — meaning the violation itself establishes that the defendant failed to meet the legal standard of care.
The Regulations That Matter Most in Phoenix Truck Cases
FMCSA limits commercial drivers to 11 hours of driving after 10 consecutive hours off duty, with a 14-hour on-duty window. Drivers may not drive after 60 hours on duty in 7 consecutive days (or 70 hours in 8 days). Every commercial truck operating since December 2017 must use an Electronic Logging Device (ELD) that automatically records driving time and flags HOS violations. When a truck driver causes a crash after a full shift or in the early morning hours, HOS compliance is the first thing to investigate. ELD data is often overwritten within 30 days — sometimes less.
Commercial drivers must submit to pre-employment drug testing, random testing throughout employment, and mandatory post-accident testing following any crash involving a fatality, an injury requiring medical treatment away from the scene, or a vehicle towed from the crash. A trucking company that failed to conduct required testing, or that kept a driver on the road after a positive test result, bears direct liability for resulting crashes. Toxicology from post-accident testing and the carrier's drug testing program records are critical discovery targets.
Commercial trucks must undergo pre-trip and post-trip inspections by the driver and systematic preventive maintenance by qualified mechanics. Brake defects are the single leading vehicle-related cause of truck crashes nationally. Carriers are required to maintain inspection records for at least 12 months. When a crash is caused or contributed to by a mechanical failure — brake fade, tire separation, steering defect, lighting failure — the carrier's maintenance records either support or destroy their defense. An attorney will subpoena these records before they can be sanitized.
FMCSA cargo securement rules require specific tie-down methods, minimum working load limits for tie-downs, and documented securement inspections. Cargo that shifts mid-route can cause sudden loss of vehicle control. Cargo that falls from a truck becomes a direct road hazard for following vehicles. When a load shift or debris ejection contributes to a crash, liability attaches to the loading company, the carrier, and in some cases the shipper who specified or approved the load configuration.
Every commercial driver must hold a valid Commercial Driver's License (CDL), pass a DOT physical examination, meet minimum age and experience requirements, and have a clean enough driving record to qualify for the specific vehicle and cargo type. Carriers must conduct pre-employment background checks and annual reviews of each driver's motor vehicle record. A carrier that hired a driver with a history of HOS violations, DUI convictions, or prior at-fault crashes — and put that driver behind the wheel of an 80,000-pound vehicle on Phoenix's freeways — faces negligent entrustment claims that can support punitive damages requests.
What to Do After a Truck Accident in Phoenix
The first hours after a commercial truck crash are the most legally consequential. Here is the exact sequence of steps that protects your health and your claim.
Truck crashes on Arizona interstates are typically investigated by the Arizona Department of Public Safety (DPS), which has authority over state and federal highways. The DPS crash report will document the truck's DOT number, carrier information, driver license class, and any visible regulatory violations. Do not move your vehicle or yourself unless there is an immediate safety hazard. The physical evidence at the scene — skid marks, debris field, final resting positions, point of impact — tells the story of the crash and must be preserved.
Every commercial truck operating in interstate commerce displays its USDOT number on the cab door. Photograph the DOT number, the truck's license plate (both tractor and trailer), the carrier name on the door, and any placard numbers indicating cargo type. This information allows an attorney to immediately pull the carrier's FMCSA safety record — including prior violations, out-of-service orders, crash history, and safety fitness ratings — before litigation even begins.
The forces involved in a truck crash — particularly a rear-end collision with a semi or a T-bone impact at an intersection — produce injury patterns not typical in car accidents. Aortic tears, splenic lacerations, vertebral fractures, and traumatic brain injuries can be present without acute pain at the scene. Go directly to the emergency room. Do not refuse transport. The documentation of your injuries on the day of the crash is the evidentiary foundation of your entire case.
Within hours of a serious crash, the carrier's insurance company will dispatch an accident reconstruction expert, a claims investigator, and potentially an attorney to the scene. Their job is to document the crash in a way that limits the carrier's liability. Your attorney's job is to demand preservation of every piece of evidence that proves it. A spoliation letter — a formal legal demand that the carrier preserve all data and records related to the crash — must be sent within days. Do not give any recorded statement to any representative of the trucking company or its insurer under any circumstances.
If you are physically able, photograph: the truck's DOT number and carrier name, all damage to both vehicles from multiple angles, skid marks and debris fields, road conditions and signage, any visible cargo or spill, the positions of all vehicles before they are moved, and any witnesses present. If dashcam footage exists in either vehicle, preserve it immediately — many devices overwrite on a loop within 24 to 72 hours.
Injuries in Truck Crashes and Their Legal Value
The injury profile from truck crashes is consistently more severe than from passenger vehicle accidents. The physics of mass and velocity translate directly into courtroom damages — and into the insurance limits that must be pursued to cover them.
| Injury | Mechanism in Truck Crashes | Legal / Financial Impact |
|---|---|---|
| Spinal cord injury / paralysis | Hyperflexion or compression of the cervical or lumbar spine in high-force collisions | Highest-value category; lifetime care costs routinely exceed $2–5M; requires life-care planner expert |
| Traumatic brain injury (TBI) | Head strike on interior or window; sudden deceleration causing brain movement against skull | Cognitive, behavioral, and physical deficits; often requires neuropsychological testing to fully document |
| Traumatic amputations | Crush injuries from vehicle intrusion; door and roof collapse in override collisions | Permanent; prosthetics, rehabilitation, and lifetime care are quantifiable future damages |
| Crush injuries / internal organ damage | Blunt thoracic or abdominal trauma from seatbelt loading and vehicle deformation | Frequently require surgical intervention; long-term complications can support ongoing damages |
| Severe fractures | Femur, pelvis, tibia, and vertebral fractures common in high-energy collisions | Surgical fixation, extended rehabilitation, and potential permanent functional impairment |
| Burns | Post-collision fuel fires, especially in tanker truck crashes or diesel fuel spills | Disfigurement, multiple surgeries, psychological trauma — high non-economic damages |
| Wrongful death | Fatal truck crashes occur at a disproportionately high rate compared to car accidents | Survivor claims for loss of companionship, financial support, and funeral costs under A.R.S. § 12-612 |
What Compensation You Can Recover
Truck accident cases in Arizona yield substantially higher recoveries than standard car accident claims for two reasons: the injuries are more severe, and the insurance coverage available is dramatically larger. Arizona's pure comparative fault rule applies — your recovery is reduced by your percentage of fault, but there is no threshold that bars recovery.
Economic Damages
- Past and future medical expenses: Emergency care, surgery, hospitalization, rehabilitation, specialist treatment, prescription medications, assistive devices, and projected lifetime care costs for permanent injuries.
- Lost wages: Income lost from missed work, supported by employer records and tax documentation.
- Loss of earning capacity: Where injuries permanently reduce work capacity, a vocational expert quantifies the lifetime economic loss — often a seven-figure calculation for younger victims.
- Property damage: Replacement value of your vehicle and any personal property destroyed in the crash.
- Out-of-pocket costs: Home care, transportation, adaptive modifications to home or vehicle, and other direct crash-related expenses.
Non-Economic Damages
- Pain and suffering
- Emotional distress and PTSD
- Loss of enjoyment of life
- Loss of consortium
- Disfigurement and permanent scarring
Punitive Damages
Arizona allows punitive damages where a defendant's conduct was "aggravated, outrageous, malicious, or fraudulent." In truck cases, punitive damages are available where a carrier knowingly kept a fatigued driver on the road in HOS violation, where a company retained a driver with a known DUI history, or where maintenance records show deliberate falsification of inspection reports. Punitive damages are not available in every case — but in cases of egregious carrier conduct, they can multiply the compensatory award substantially.
How Trucking Companies Fight Your Claim
Trucking companies and their insurers are among the most sophisticated defendants in personal injury litigation. They have specialized claims teams, established defense law firms, and a playbook refined over thousands of cases. Understanding their tactics is essential to defeating them.
Large carriers maintain rapid response agreements with accident reconstruction firms and defense law firms. Within hours of a serious crash, their team may be at the scene photographing evidence, interviewing witnesses, and documenting the scene from a liability-minimization perspective. Their investigators are not neutral. Every photo they take, every measurement they record, every witness statement they collect is gathered to support their defense. Your attorney's first action must be dispatching an equally qualified response — or securing an evidence preservation demand that legally prohibits the carrier from altering, discarding, or accessing any evidence.
Trucking companies routinely argue that ELD data, black box recordings, and onboard camera footage were overwritten in the normal course of business before they could be preserved. This is not always dishonest — retention periods are genuinely short. But when a carrier knows litigation is likely and allows evidence to be overwritten anyway, that is spoliation — the intentional destruction of evidence — which courts may sanction with adverse inference instructions or default judgments. A spoliation letter sent by an attorney within days of the crash creates a legal record of the preservation demand and the carrier's response. If evidence disappears after that letter, the consequences for the carrier can be severe.
When a crash involves an owner-operator who contracted with a carrier, the carrier will frequently argue that the driver was an independent contractor rather than an employee — and that therefore the carrier is not vicariously liable under respondeat superior. Federal courts applying FMCSA regulations have largely rejected this argument when the carrier's DOT placard was displayed on the truck, when the carrier controlled the driver's routes and schedules, or when the lease arrangement met the definition of employment under federal regulations. An experienced attorney will know how to pierce this defense and keep the carrier — and its insurance — in the case.
Trucking insurers routinely retain biomechanical experts who testify that the forces involved in the crash were insufficient to cause the injuries claimed, and IME physicians who conclude that any real injuries are the product of pre-existing conditions rather than the crash. These experts are professionals who testify regularly for defense — their opinions are for sale. Your attorney will retain equally qualified experts to rebut these conclusions, with the benefit of actually treating you rather than reviewing a file from across a conference table.
How DIG Law Handles Phoenix Truck Cases
Truck cases require resources, speed, and specialized knowledge that most personal injury firms cannot provide. At Duncan Injury Group, our approach to Phoenix truck accident cases is built around the realities of how these defendants fight:
- We send spoliation letters within 24 to 48 hours of being retained, demanding preservation of ELD data, black box recordings, dashcam footage, maintenance logs, driver qualification files, and all communications related to the crash
- We pull the carrier's full FMCSA safety record — prior violations, out-of-service orders, crash history, and safety fitness ratings — before the first demand letter goes out
- We retain accident reconstruction experts, biomechanical engineers, and medical specialists early, building the case narrative around evidence rather than settlement pressure
- We identify every liable party and every available insurance source — primary liability, umbrella policies, cargo insurance, manufacturer product liability coverage, and government entity claims where road conditions contributed
- We litigate aggressively when carriers refuse to pay fair value — and trucking defense firms know it
DIG Law has recovered $250M+ for injured clients across Florida and Arizona. There are no fees unless we win.
Hit by a Truck in Phoenix? Call Us Before You Do Anything Else.
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