Federal Rules That Decide Truck Cases
Impairment
Federal rules bar a commercial driver from drinking inside four hours of going on duty, from any measured alcohol while on duty, and from driving on Schedule I drugs, amphetamines, narcotics or any medication that makes driving unsafe (49 CFR 392.4 and 392.5). A carrier that lets an impaired driver work shares the exposure.
Finding the company that actually pays
Every commercial vehicle must show the operating carrier's name and USDOT number on both sides, readable from fifty feet, and a leased truck running under another company's name has to add 'operated by' with that carrier's details (49 CFR 390.21). A photograph of the door is often what identifies the right defendant.
Insurance minimums
Interstate general freight requires at least $750,000 in liability coverage. Hazardous loads require more, $1,000,000 for many and $5,000,000 for certain bulk substances (49 CFR 387.9), and the tankers running I-15 through Farmington sit in those higher tiers.
If the truck leaves
Your uninsured motorist coverage may respond to a hit-and-run. Where nothing physically touched your vehicle, Utah demands clear and convincing proof beyond your own account that the truck existed, so any fragment of a name or number you caught matters.
Preserving the evidence
Electronic logging data, engine control module downloads and dashcam files get overwritten on a carrier's ordinary retention cycle. A written preservation demand sent in the first days is what keeps them available later.