The research focuses on three main issues:  an a real population be fit into the set of standardized crash test dummies? What influence do the differences between dummies and real occupants        have on the level of safety of the occupants? Which parameters should the occupant classification system measure to adapt the settings of passive safety devices to the individual needs? The answer was approached in three steps. The first step was analysis of two crash databases, taking into account anthropometry of the drivers and their injury level. The second step was development of a matrix of numerical simulations with use of crash test dummies, scaled in such a way as to address various height and weight of the occupants. Finally, the simulation results were compared to the trends in the crash databases.