Skid Mark

High Quality Content by WIKIPEDIA articles! In motoring terms, a skid mark is the mark a tire makes when a vehicle wheel stops rolling and slides or spins on the surface of the road. More generally, any solid which moves against another can cause visible marks, and is an important aspect of trace evidence analysis in forensic science and forensic engineering. Skid marks are important for finding the maximum and minimum vehicle speed prior to the impact or incident. Skidding can also occur on black ice or diesel deposits on the road and may not leave a mark at all, the absence of evidence not being evidence of absence. Skid marks are divided into "acceleration marks" created on acceleration, if the engine provides more power than the tire can transmit, "braking marks," if the brakes "lock up" and cause the tire to slide, or "yaw marks", if the tire slides sideways.... Mehr