Since 1970, traumatomechanics has been a focal point in research at the Institute for Legal Medicine and Traffic Medicine in Heidelberg. Here, the main topics are the understanding of the interrelation between mechanical strain and the resulting degree of injury; at the forefront of all interest is the determination of the mechanical resilience in humans, their organs and tissues. Important are not only the means, but likewise the individual strain tolerance and the causes for its variability. Their understanding leads to scientifically justifiable expert's reports. In safety research, these data are of major importance for the validation of crash-dummies and for the improvement of safety protection systems. Before this background, national and international institutions have supported numerous projects. With the help of 2 examples, the Thorax-Trauma-Index (TTI) and the synergy between safety belt and airbag, the relevance of these data for international regulatory provisions and the progress in safety practice are illustrated. Some traumatomechanical insights can only be gathered from human corpses. Legal prerequisites and ethical problems of experiments with corpses are discussed.