I think it is worth mentioning that violent crime and property crime are down more than 10% post-legalization, that the state forecasts $30M in tax revenue, and $2M has already been created for local schools.
I'm sure the technology will improve. In fact, a "marijuana breathalyzer" (using that term loosly because you would need something that can test for edibles too), is probably a pretty interesting product to bring to market
I am pretty sure there have been some studies that show people under the influence of marijuana are less likely to drive than people under the influence of alcohol so it just depends on whether marijuana is replacing alcohol or not.
I'm genuinely curious, but want to make sure such things are sound before using them in national debate.
A statistically insignificant result is politically significant: it wrecks the 'omg pot smokers will lead to tons of crime' argument some politicians were making.
Although I absolutely agree that the tax revenue is a great boon.
http://www.city-data.com/crime/crime-Denver-Colorado.html http://www.city-data.com/crime/crime-New-York-New-York.html