Crashes involving semi-trucks — also called tractor-trailers, 18-wheelers, or commercial motor vehicles — are legally and financially more complex than most passenger car accidents. The injuries tend to be more severe, the number of parties involved is typically larger, and the rules that govern commercial trucking add layers that don't exist in standard auto claims. Understanding how attorneys typically get involved in these cases, and why, helps explain what the process usually looks like.
When a crash involves a commercial truck, the web of potential liability expands significantly. In a standard two-car accident, liability usually falls on one or both drivers. In a semi accident, responsibility might extend to:
Federal regulations from the Federal Motor Carrier Safety Administration (FMCSA) govern commercial trucking — including hours-of-service rules, vehicle inspection requirements, and driver qualification standards. Whether those regulations were followed (or violated) often becomes a central issue in these claims.
Commercial trucks carry documentation that can be critical to establishing what happened:
This evidence often has to be preserved quickly, because trucking companies and their insurers typically launch their own investigations immediately after a serious crash. Some data is overwritten or lost within days if not formally requested or legally preserved.
Fault determination in a semi accident follows the same general framework as other vehicle accidents — police reports, witness statements, physical evidence, and expert reconstruction — but with the added layer of federal compliance records.
Comparative fault rules vary by state. In most states, fault can be shared among multiple parties, and compensation may be reduced proportionally based on how much fault is assigned to the injured person. A small number of states still use contributory negligence rules, which can bar recovery entirely if the claimant is found even partially at fault.
Because trucking companies typically carry commercial liability insurance with much higher limits than personal auto policies — sometimes $1 million or more per incident — insurers often assign experienced adjusters and defense attorneys to these claims quickly.
The categories of damages in a semi accident claim generally mirror those in other personal injury cases, but the amounts involved can differ substantially due to the severity of injuries:
| Damage Type | What It Generally Covers |
|---|---|
| Medical expenses | ER care, surgery, hospitalization, rehabilitation, future care needs |
| Lost wages | Income lost during recovery; lost earning capacity if injuries are permanent |
| Property damage | Vehicle repair or replacement |
| Pain and suffering | Physical pain, emotional distress, loss of enjoyment of life |
| Wrongful death | When a crash results in a fatality — who can claim and what's recoverable varies by state |
How these damages are calculated — and which are available — depends heavily on state law, the severity of injuries, and whether the case settles or goes to trial.
Most personal injury attorneys who handle truck accident cases work on a contingency fee basis, meaning they receive a percentage of any settlement or court award rather than charging upfront. Contingency percentages vary but commonly fall in the 33%–40% range, sometimes higher if a case goes to trial — though these figures vary by attorney, firm, and jurisdiction.
What an attorney in these cases typically does:
People more commonly seek legal representation in semi accident cases — compared to minor fender-benders — because the injuries are often severe, multiple insurers may be involved, and the trucking company's insurer typically has professional claims teams working against the claimant's interests from day one.
Statutes of limitations — the legal deadline to file a civil lawsuit — vary by state and by the type of claim. In some states, the window is one year; in others, it may be two or three years from the date of the accident. Claims against government entities (such as a publicly-operated transit truck) often have much shorter notice deadlines — sometimes as little as 90 days.
Delays in semi accident cases are common. Severe injuries require time to understand long-term medical needs before damages can be fully assessed. Complex liability disputes between multiple defendants take time to sort out. And litigation involving large commercial insurers often involves extended discovery and negotiation.
No two semi accident claims resolve the same way. The factors that determine what happens — and when — include:
The same crash, with the same injuries, can produce very different outcomes depending on the state where it occurred, the trucking company's insurer, and the specific facts that emerge during investigation.
