Evaluation of car accident parameters during collision

According to he literature source, almost 47-52 % from all car crashes make collisions of cars. So it is possible to conclude that almost each second a car crash is a collision. One of the most important parameters that should be determined during car crash investigation is the car speed before the accident. Calculation of the parameters in various situations differs. The experts performing the investigation work of car crashes improve or create car crash investigation methods in various cases. The methods of speed determination before crashes are presented in these cases: direct collision, when cars move one after another, direct sided collision and sided sliding collision as well