The impact between the head and the vehicle is the prime cause of death to pedestrians and moped riders (i.e. users of two-wheel vehicles with an engine with a capacity less than 50 cm3). Accordingly, the accidentological and experimental analysis of these impacts deserves priority attention. Statistical and accidentological data concerning the impact between the head and the vehicle of users outside the vehicles are summarized. The objectives and methodology of an experimental study of impact between the head and the vehicle are indicated, A number of results of simulations and reconstructions of impact between the head and the vehicle with dummies,with a separate dummy head and with a cadaver are presented. Proceedings of the 3rd International Conference on Impact Trauma. Berlin, Germany. 7,8,9 September 1977 Language: en