Like the curved streak left by a shopping cart when it swings too fast through a turn, these are tire marks made when a vehicle is still rolling but sliding sideways at the same time. In crash work, yaw marks help show that a driver likely lost control during a curve or sudden steering move. They are not the same as straight skid marks, and treating them as interchangeable is a common mistake. Yaw marks often curve, may show faint striations from the tire tread, and can help an accident reconstruction expert estimate speed, steering input, and the vehicle's path before impact.

That matters because people often assume a wreck was "just bad weather" or "just happened too fast to know." Not always. On I-80 in Nebraska, especially during winter pileups with ground blizzards and heavy truck traffic, yaw marks can suggest a vehicle entered a turn too fast, overcorrected, or changed lanes abruptly before the crash. They can support or weaken claims about negligence, loss of control, and whether a driver had time to react.

For an injury claim, yaw marks can affect fault, comparative negligence, and insurance payouts. But they are only one piece of evidence. Photos taken late, plowed snow, heavy traffic, or a second collision can distort them. Bad advice says "the marks prove everything." They do not. They help tell the story when matched with vehicle damage, scene measurements, and witness statements.