2019 Driving Under the Influence of Drugs and Alcohol Report Colorado Department of Public Safety, Division of Criminal Justice, Office of Research and Statistics "Little is known about drug-involved driving when alcohol is not involved. In part, this is because alcohol is the most common cause of impaired driving. Consequently, much research exists regarding alcohol use and driving, but there is a paucity of information about marijuana-involved driving." To view the report, click here.
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