This paper is based on the results of 50 pedestrian cadaver tests in which the lower limbs injuries were carefully analyzed. The leg injury distribution, the consequences of these injuries will be evaluated through the analysis of equivalent injuries sustained by pedestrian in traffic accidents.These injuries are of several types and involve all biological tissues of lower limbs. We propose a classification of these injuries according to their kind, their location, their number and their association. This classification allows us to point out that present scales are not enough detailed and are not suitable for the reality of these injuries. On this basis we propose intermediate stages in order to refine the present AIS and MAIS scales.