Regarding the impairment, keep in mind that alcoholics will show little impairment even at very high intoxication levels (2 per million and above). At the same

Regarding the impairment, keep in mind that alcoholics will show little impairment even at very high intoxication levels (2 per million and above). At the same time, alcoholics probably shouldn't be allowed to drive, generally speaking, so testable impairment is a bad measure. I kind of think the 0.0 laws in the Scandinavian countries make a lot of sense, if you plan to drive, just don't drink anything, full stop.