Try telling that to OSHA, or in event there is a loss of life from a accident try telling that to the DA, A Positive is a Positive. Even thou pot is legal in Colorado, they are still including impairment as a contributing factor.
So if you are out on a Sunday cruise and you are pulled over and smoke rolls out your window you will be going to jail and charged with Impaired driving, no test required same as Public Intoxication.
The legalizing of pot in Colorado was a back room design on how to generate money from sales and generate money for the court system, it is a catch 22.
This is CABL.com posting #362468. Tiny Link: cabl.co/mbGsq