Marijuana has been legal for recreational use in Colorado for a couple of months now and the state's Department of Transportation has launched a new ad campaign to discourage residents from smoking and driving high. CDOT's (Colorado Department of Transportation) new "Drive High, Get a DUI" campaign, which features commercials aimed at men aged 21 to 34 - the demographic with the highest number of DUIs, started earlier this month. From 2006 through 2012, about half of drivers involved in a fatal car crashes were tested for drugs. About 11 percent of those drivers tested positive for marijuana, according to…