Short answer: A truck accident lawsuit is an evidence campaign. It begins with a preservation demand within days of the crash, builds through discovery of the carrier's own records — driver logs, engine data, maintenance files — and usually ends in settlement once the documented case makes trial the more expensive option for the insurer.
Before filing: preservation and investigation
The first formal step is a spoliation letter putting the motor carrier on notice to preserve the electronic logging device data, engine control module downloads, dashcam footage, dispatch communications, the driver qualification file, post-crash drug-test results and maintenance records. Without that notice, routine data cycles get overwritten legally. In parallel: scene evidence, witnesses, the police crash report and any commercial-vehicle inspection findings.
The demand and negotiation phase
Most cases begin as insurance claims. Once your medical picture is stable, a demand package presents liability evidence and damages. Many Arizona truck claims resolve here — but the serious ones often do not, because the money at stake justifies the insurer testing your willingness to litigate.
Filing suit and discovery
Suit must be filed within Arizona's deadlines — generally two years (A.R.S. § 12-542), with the much shorter 180-day notice for public entities (A.R.S. § 12-821.01). Discovery is where trucking cases are won: depositions of the driver and the carrier's safety personnel, and document production that surfaces hours-of-service violations, skipped maintenance, or a driver who should never have been hired. Electronic logging devices in particular have made fatigue cases provable in a way they never used to be.
Experts, mediation, trial
Accident reconstructionists, trucking-safety experts and medical experts translate the records into a case a jury can weigh. Courts typically require mediation before trial, and most cases settle there — on numbers shaped by everything preserved and proven along the way. The small fraction that try are the ones where the sides still disagree about fault percentages under Arizona's comparative-fault system or about what the injuries are worth.
How truck lawsuits differ from car lawsuits
Three ways: the evidence is richer (the truck documents itself), the defendants are multiple (each with its own share of fault under A.R.S. § 12-2506), and the defense is professional — carriers and their insurers litigate for a living. The general stages mirror any Arizona injury lawsuit, but the outcome tracks the trucking-specific evidence.
Filing: the complaint and the carrier's answer
The complaint names every defendant the investigation identified — driver, carrier, and any loader, owner or maintenance contractor with a share of fault — and states the claims against each: negligence, vicarious liability, negligent hiring and entrustment as the facts support. The defense answers, fault is formally disputed, and Arizona's comparative-fault machinery (A.R.S. §§ 12-2505, 12-2506) frames everything that follows: every party's percentage is now in play, including any share the defense wants to pin on you.
Depositions: what each side is after
Your deposition covers the crash, your injuries and your history — preparation matters, honesty matters more. Ours cover the driver (the crash, the hours, the training), the carrier's safety director (policies versus practice), and its corporate representative, who must answer for the company's records. A safety director explaining under oath why the logs show one thing and the dispatch records another is frequently the moment a disputed case becomes a settled one.
What the experts actually do
The reconstructionist turns physical evidence and engine data into speed, distance and timing. The trucking-safety expert measures the carrier's conduct against federal regulations and industry practice. The medical experts connect the crash to the injuries and project future care; an economist prices it. The defense fields its own set. Cases are largely decided by whose experts the evidence better supports — another reason preservation in week one controls outcomes in year two.
Your role while the case runs
Keep treating, keep records, stay off social media about the crash, and route every insurer contact to your lawyer. The legal work is ours; the medical consistency that makes the damages case is yours. Cases are damaged more often by treatment gaps and online posts than by anything the defense discovers on its own.
Costs, and how the contingency fee works
Expert witnesses, depositions and records are real costs, advanced by the firm and repaid from the recovery. The fee itself is contingent: 25% if the case resolves without litigation, 30% once litigation is required, and nothing unless you recover. The step-up exists because litigation multiplies the work — and knowing the number in advance is part of choosing when settlement is the right answer.
How long does a truck accident lawsuit take?
Commonly one to two years from filing, driven by discovery volume and court schedules. Cases with clear regulatory violations tend to resolve faster because the liability fight is short.
Will I have to go to trial?
Probably not — most settle at or before mediation. But settlement value comes from being genuinely prepared to try the case, which is why we build every file as if it will see a jury.
What does it cost to file a truck accident lawsuit?
With Hirsch & Lyon, nothing up front. The contingency fee is 25% if the case resolves without litigation and 30% in litigation, plus case costs — and no fee at all unless you recover.
Is there a deadline to sue after a truck accident in Arizona?
Two years for most claims (A.R.S. § 12-542); 180 days to serve a notice of claim and one year to file when a government entity is involved (A.R.S. §§ 12-821.01, 12-821). The evidence deadlines are far shorter — preservation cannot wait.
Talk to a board-certified specialist about your case — free, 24/7: (602) 535-1900 or request a free case review online. No fee unless you recover.
