I don't think anyone would disagree that stopping people who are "too high to drive" is a bad thing. The problem is, it appears that the correlation between THC level in the blood and actual impairment is too loose to be useful. Unlike measuring blood alcohol level, detectable THC levels don't necessarily match up with inability to perform field sobriety tests.
That makes proper detection of stoned drivers more difficult, but it also means that states (like Colorado) who have passed a simple THC level test for citation or arrest are going to need to rethink their approach.
Blood THC levels after smoking pot are useless in defining “too high to drive”
Better metrics needed as study finds increase in fatal crashes involving weed.
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Also, getting pulled over tends to purge the effects out of one's system rather quickly.
+Dave Hill "disagree…a bad thing". Don't you mean disagree…good or argue…bad?
+Gordon Rowell I appear to have mixed my double negatives. Corrected.
+Dave Hill lol. I was too high to notice. ;^>