Government Study Confirms Marijuana Impairs Drivers Less Than Alcohol, Casts Doubt on Stoned Driving Definitions

by Jacob Sullum.   A new study by researchers at the National Institute on Drug Abuse (NIDA) confirms that marijuana has a less dramatic effect on driving than alcohol does and casts further doubt on the standard that Colorado and Washington use for determining when someone is too stoned to drive. In the double-blind study, 18 occasional cannabis   ... MORE