Emperical evaluation of impaired driver legislation.

Impact of the 0.8 legislation on driver fatalities in one Canadian province is assessed empirically from a number of research perspectives. Using B.A.C.'s of fatally injured drivers, it was found that the 0.8 legislation had no apparent impact upon the incidence of fatally injured drivers. In contrast, an enormous decrease in the incidence of fatal crashes of non-impaired drivers followed the 0.8 legislation. This impact lasted for about one year. The implications of these findings for future countermeasures and future evaluative studies, are discussed.