The rate of police-reported impaired driving incidents in Canada has declined steadily from 671 per 100,000 population in 1983 to 483 per 100,000 population in 1992. During the same period, the number of persons charged with driving under the influence fell by 41 percent. This downward trends in the incidence of drunk driving can probably be attributed to reduced societal tolerance toward drinking and driving, as well as changes in legislation, improved law enforcement, and new government-funded alcohol treatment programs. In 1991, 48 percent of all drivers killed in Canada had consumed alcohol before driving; of these 63 percent had blood-alcohol concentrations almost twice the legal limit. Ninety- one percent of persons charged with impaired driving were male and 70 percent were between the ages of 17 and 40. All provinces reported a decrease in the rate of drunk driving between 1991 and 1992. 6 figures, 5 tables, 12 notes, and 9 references