The authors describe the methodical approach to the prediction of health risk assessment within the framework of preventive hygienic supervision. Based on data in the literature they explain the selection of risk factors associated with road transport - i.e. noise, emission of harmful chemical substances.For estimating health risks of nitrogen oxides the authors use recommended predictions based on epidemiological surveys. They recommend to use dispersion models which can take into account spatial relations in urban areas for evaluation of exposure.

        Key words: health risk assessment - risk management -identification of noxious substances - dose-effect relationship - estimated exposure - socially acceptable health risk