Question for those of you living in a country where marijuana is legal. What are the positive sides, what are the negatives?
If you could go back in time, would you vote for legalising again? Does it affect the country’s illegal drug business , more/less?
Impairment is impairment and being tired or distracted by phones/technology is often even worse than being intoxicated or high but we tend to love using BAC because it is easy to measure. Locations that legalized weed didn’t have an increase in impaired driving last time I checked, because most people don’t go out driving when they are high while people often drive intoxicated after drinking at bars.
BAC is also well correlated with impairment. Obviously it varies from one individual to another, but it is related strongly related enough to have fair and consistent enforcement.
AFAIK, blood tests that measure the presence of marijuana are relatively cheap, but measuring the concentration is slightly more difficult and is not well correlated with impairment. That means enforcement is problematic and subjective.