Samenvatting
In addition to the problems that one encounters in normal statistical work, in the field of traffic safety research one has to cope with some problems that have in common that they appear when the numbers of accidents grow large enough. By the decrease of the number of accidents it is therefore necessary to develop and use statistical methods that take into account the underlying discrete distribution of accidents. Two methods are discussed here: The Poisson Assumption and the Regression-to-the-Mean effect.