re: #853 kirkspencer

For legal purposes, yes. See Blood Alcohol Content for DWI conviction.

How much the substance actually interferes with individual performance depends on a number of factors.

So for legal purposes, they are assuming that what works for alcohol is close enough for marijuana? I was wondering how this would play out with legalization becoming widespread. Will drivers have to submit to blood tests instead of being able to opt for the breath or urine tests?

Consider the questions rhetorical if you like.