Drivers in the comparison states didn't deem marijuana as problematic as drivers in recreational use states. Forty-three percent of drivers in legal-use states said driving after using marijuana is a problem in their communities, compared with 28 percent in other states. Drivers who supported legalized recreational marijuana were much less likely to see driving after using marijuana as a problem than those who opposed legalization.
Further, drivers in marijuana-legal states were twice as likely to report using
marijuana within the past year and more often were drinkers than the
comparison-state drivers. They also were more likely to report driving
within two hours of using marijuana or drinking alcohol relative to the
comparison states.
NAFA Fleet Management Association
http://www.nafa.org/