Abstract
A simulated automobile driving apparatus was used to evaluate the effect of alcohol as it pertains to several functions involved in driving an automobile. A direct relationship between the blood alcohol concentration and the extent of impairment of function was demonstrated. Impairment of performance was demonstrated i n the presence of a blood alcohol concentration of 0.05%. In the presence of a blood alcohol concentration of 0.15% performance had decreased to approximately two-thirds of the control values. Certain medicolegal aspects of the problem of alcohol as it influences the automobile driver are discussed.