While drunk driving remains the primary risk on the roads during the holiday season, a new PSA campaign focuses on cannabis-impaired drivers -- and the prevalence of nonchalant attitudes about driving ...

Scientists want to create breathalyzers that show how recently a driver used marijuana. Researchers also are studying how cannabis impairs motor skills and reflexes for habitual and occasional users.

Mississippi officials warn drivers: Marijuana DUI is real and illegal ...

BOULDER, Colo. — In Colorado, where the United States’ experiment with legal recreational marijuana began a little more than a decade ago, a team of federal scientists has been paying regular cannabis ...