Impaired driving in Canada / : Conduite avec facultés affaiblies au Canada

Canadian Facts on Impaired Driving There are a variety of sources of information on the extent of impaired driving in Canada. [...] Figure 1 shows the percentage of CADUMS respondents who reported driving within an hour after consuming two or more drinks and the percentage of respondents who reported driving within two hours of using cannabis in each year of the survey. [...] Roadside Surveys Another approach to determining the prevalence of driving after drinking plus driving after drug use is to collect voluntary breath and oral fluid samples from a random sample of nighttime drivers to test for the presence of alcohol and drugs. [...] The prevalence of alcohol- and drug-impaired driving greatly exceeds the capacity of police to detect and charge offenders, so there are many more instances of the behaviour than ever come to the attention of the police. [...] Hence, the data on impaired driving charges are strongly influenced by the level of enforcement: the higher the level of enforcement effort, the higher the number of impaired drivers detected.