Miss this term, and a crash can get described as a "minor impact" when the vehicle forces say otherwise. That can hurt a claim fast: an insurer may downplay injuries, a defense expert may argue the collision was too slight to cause real harm, and the paper trail starts drifting away from what actually happened.

Delta-v means the change in a vehicle's speed during a crash, usually measured in miles per hour. It is not the same as the speed limit, the speed shown on the dash before impact, or how badly the car looks after the wreck. It is a reconstruction number used to estimate how much force was transferred in the collision. In plain terms, it helps explain the violence of the impact, even when the sheet metal is not especially dramatic.

That matters in Wyoming crashes because surface conditions and vehicle size can muddy the story. On black ice outside Casper, in high wind on I-80, or in a crash involving a pickup, semi, or work truck from the oilfield, visible damage may not tell the whole truth. A low-crush collision can still produce a meaningful delta-v, and that can support claims involving neck, back, or head injuries.

Reconstruction experts may calculate delta-v from event data recorder downloads, vehicle damage, scene measurements, and crush analysis. It is evidence, not magic, but when the other side starts calling a wreck "just a bump," this is often one of the numbers that decides whether that story holds up.