A tractor-trailer runs about 80,000 pounds. A mid-size car runs about 4,000. Twenty times the mass, and physics does not negotiate. That ratio is why these crashes produce catastrophic injuries at speeds a car-to-car collision would survive.
It is also why the case is different from the moment it happens.
The clock that starts immediately
Most of the proof in a trucking case is electronic, and most of it is on a retention schedule that is measured in days.
- The ELD. Federal law requires an electronic logging device recording drive time, duty status and engine hours.
- The ECM. The engine control module holds speed, throttle position, brake application and hard-braking events in the seconds before impact. Some units overwrite on a rolling basis.
- Dispatch and messaging. What the driver was told, when, and what delivery window they were being held to.
- Driver qualification file. Licensing, medical certification, prior violations, training.
- Maintenance and inspection records. Brake adjustments, tire condition, pre-trip inspection reports.
None of this is sitting on the roadside waiting. A motor carrier's retention policy can lawfully destroy some of it on schedule — and once it is gone, the argument shifts from what the data showed to what a jury should infer from its absence. That is a far weaker position.
A preservation letter has to go out before that schedule runs. It puts the carrier on notice that the material is evidence and that destroying it now is spoliation rather than routine housekeeping.
Federal rules do the arguing for you
Interstate trucking is governed by the Federal Motor Carrier Safety Regulations, and violations are not abstract paperwork failures. They map directly onto how the crash happened.
- Part 395 — hours of service. Drive-time limits and mandatory rest. A driver over hours is a fatigue case with a documentary trail.
- Part 392 — driving of commercial motor vehicles. Includes the rule that a driver must not operate while ability is impaired, including by fatigue or illness.
- Part 393 — parts and accessories necessary for safe operation. Brakes, lighting, tires, load securement.
A logbook that disagrees with the ELD, the fuel receipts or the delivery timestamps is one of the most useful things a trucking case can contain.
Who is actually liable
This is the part people do not expect. The driver is rarely the only defendant, and often not the most significant one.
- The motor carrier is generally responsible for the driver acting in the course of employment, and separately for its own negligence in hiring, training, supervision and retention.
- The maintenance provider where a mechanical failure contributed.
- The broker or shipper in some arrangements.
- The cargo loader, where shifting or improperly secured freight caused or worsened the loss of control.
Each of those is a separate potential policy. That matters more than it sounds, because in most serious injury cases the real ceiling is not the severity of the injury — it is the amount of coverage available to pay for it.
The MCS-90 endorsement
Interstate motor carriers are required to carry minimum levels of financial responsibility, and the MCS-90 endorsement functions as a backstop: it obliges the insurer to pay a judgment for public liability even where the policy might otherwise not respond, subject to reimbursement from the insured.
It is not a substitute for finding the right policies, and it is not automatic money. But in a case where coverage is being disputed, it is one of the first things to look for.
What the at-fault carrier does early
Expect contact quickly, and expect it to be organised. A commercial carrier's adjusters handle these constantly. Common early moves:
- A recorded statement requested in the first days, before the injury picture is known. Utah Code § 78B-5-813 limits the use of a statement taken within 15 days of the occurrence or while you are hospitalised — the statement is inadmissible unless a verbatim copy was left with you and you did not disavow it in writing inside that window.
- A quick settlement offer covering the immediately visible costs. If you are injured, a release signed within 15 days of the crash, or before your initial hospital discharge, is voidable under § 78B-5-812.
- An early fault theory built on the police report. A Utah crash report is generally inadmissible hearsay and is not a binding finding of fault — useful for identifying parties and insurers, not for deciding the case.
The deadlines
- Personal injury — four years. Utah Code § 78B-2-307.
- Wrongful death — two years. § 78B-2-304.
- Damage to the vehicle itself — three years. § 78B-2-305, and it covers diminished value and total loss as well as repair.
Those are outer limits for filing, not a reason to wait. The electronic evidence above is gone long before any of them expire.
What to do in the first week
Get medical attention and follow through on it. Photograph everything, including the truck's markings, the USDOT number on the door and the trailer. Collect witness contact details rather than relying on the report. Keep the vehicle available for inspection before it is repaired or salvaged, because it is evidence too.
Then get a preservation letter out. The single largest difference between a trucking case that works and one that does not is usually whether somebody demanded the electronic records while they still existed.