A growing number of juries in Colorado are acquitting people of driving under the influence of cannabis. Residents just don’t think that being over the legal limit for cannabis is the same as being over the legal limit for alcohol, and they are correct. There is no authoritative data on blood-THC levels and impairment, as there is with alcohol.
This application of logic and defiance of an arbitrary number is driving prosecutors into a hissy fit
Source: Colorado juries keep letting people go for driving on weed, prosecutors and cops furious