Laws and enforcement programs have been implemented to increase the certain
ty, swiftness, and severity of punishments for drinking and driving. Certai
nty of punishment may be the most important deterrent to drinking and drivi
ng among the general population. Researchers, however, have not fully evalu
ated deterrent effects among young drivers. We examined effects of perceive
d certainty and severity on alcohol-impaired driving among 8909 high school
seniors in 15 upper Midwest communities. We also examined gender differenc
es and binge drinking as they relate to drinking and driving. Mixed-model r
egression analyses were conducted using a repeated cross-sectional design.
Male gender and binge drinking during the past two weeks were significantly
associated with drinking and driving. Significant interactions were found
between binge drinking and perceived certainty of punishment. Binge drinker
s who perceived high certainty of punishment were less likely to drink and
drive. Among non-binge drinkers, perceived certainty did not have a deterre
nt effect. (C) 1999 National Safety Council and Elsevier Science Ltd.