Abstract
The author has already studied original methodologies especially suited for evaluating the kind and seriousness of injuries in a road accident, including a practical method for data acquisition. One such methodology consists of calculating the relationship between the number of injuries in a single person run over by a car and the number of people we know who have suffered injuries. Such a relationship can be considered as "Seriousness Injuries Factor". This meaning, which is generally accepted, is based on the evaluation by the traumatologist of any single minimum injury in an injured body related to the number of people injured.