Statistical trends suggest that some policies or activities toward drunk driving are having desired effects. Intoxication among drivers involved in fatal accidents is down, although light to moderate alcohol exposure remains relatively unchanged. Most adults may be maintaining consumption but are separating drinking and driving either because they believe the chance of getting caught has increased or that drunk driving is dangerous behavior. Teens are either drinking less or changing where they drink, so as to avoid contact with vehicles after drinking. Problem drinkers apparently remain relatively unaffected. This trend may be temporary, however, as is suggested by the 1986 increase in alcohol-related fatality rates. Research should determine whether people's perceptions and attitudes toward drunk driving have significantly changed. If so, this could mark a fundamental change in dominant behavioral patterns, contributing to a permanent change in drunk driving patterns in America. Comments accompanying this paper pertain to additional drunk driving countermeasures not mentioned in the paper, the costs of drunk driving deterrence, and the law enforcement contribution to drunk-driving deterrence. 6 tables, 8 figures, 40 references.