Impaired driving is one of the leading attributes to deaths and injuries on roadways worldwide. Research describing the magnitude and characteristics of the alcohol-impaired driving problem is shown on this webpage. It contains a brief overview of the impaired driving landscape in Canada and the U.S., describes implications for passengers, and includes general demographic information about offenders using a question and answer format. It also summarizes important research findings about these topics using data from several sources to illustrate the effects on road safety.