Skid marks are the result of tire sliding over a roadway. What information can skid mark analysis provide?

Skid marks are the result of tire sliding over a roadway. What information can skid mark analysis provide?

• A. Results from a tire sliding over a roadway or another type of surface
• B. Tire color
• C. Engine horsepower
• D. Weather conditions years ago

Answer: (A)

Skid marks come from tires sliding across a road surface, and that friction-based interaction is what lets investigators extract meaningful information. Because the marks are created by sliding, their length and appearance reflect how fast the vehicle was going at the start of braking and how quickly it decelerated, which depends on the pavement’s friction and tire condition. Analyzing the skid marks helps reconstruct the speed and braking behavior, as well as infer surface conditions at the time (dry, wet, or slippery) and the general direction of travel. It doesn’t provide tire color, engine horsepower, or weather conditions from years ago, since those factors don’t leave direct, measurable signatures in the skid marks.

Skid marks come from tires sliding across a road surface, and that friction-based interaction is what lets investigators extract meaningful information. Because the marks are created by sliding, their length and appearance reflect how fast the vehicle was going at the start of braking and how quickly it decelerated, which depends on the pavement’s friction and tire condition. Analyzing the skid marks helps reconstruct the speed and braking behavior, as well as infer surface conditions at the time (dry, wet, or slippery) and the general direction of travel. It doesn’t provide tire color, engine horsepower, or weather conditions from years ago, since those factors don’t leave direct, measurable signatures in the skid marks.