Abstract
The Institute for Road Safety in Holland (SWOV) has carried out three roadside surveys into drinking habits: one in 1970, one in 1971 and the most recent in 1973. The main purpose was to acquire knowledge concerning the degree and pattern of alcohol usage by motorists prior to the introduction of a legally prescribed Blood Alcohol Concentration (BAC) limit. The trends revealed in these surveys will be taken into account in determining the effect of the new legislation which is to be introduced in November 1974. This paper describes the present trends and attempts to uncover those variables showing a clear relation to motorists' alcohol usage. (Author/publisher)