Abstract
The purpose of the research was to study the effect of alcohol on those aspects of the ability and the personality which act fundamental part in the participation in the motorized traffic 90 drivers joined in the experiments, 60 drank, 30 not. Conclusion: the consumption of alcohol, so that the blood alcohol content reaches a maximum of 1 %, affects, the aspects of the ability and personality, which could be considered of fundamental importance for the attitude in such a way it is not longer justified to drive a car.