Abstract
An instrumented car was driven through a course on each of four experimental days, on four consecutive trials each day, after ingestion of an alcohol or a placebo beverage, and after a night of normal sleep or following 29 hours of sleep deprivation. Its is concluded that, if control-use behaviour was to serve as an index of alcohol-associated impairment, the influence of sleep deprivation and individual differences would have to be taken in consideration.