It is imperative that physical facts from the roadway be documented. This includes the debris, vehicle parts, vehicle fluids, blood, and multiple classifications of tire marks and metal scars, which are gouges in the road caused by vehicles involved in the accident. It is critical that the measurements of the tire marks be accurate. Vehicle fluids can show the path of travel. A puddle of vehicle fluid can show the final resting place of the vehicle. Accident may involve a puncture of the radiator whereby content is released almost immediately. This would assist in finding the area of the impact.