Quote Originally Posted by lampost
The fact of the matter is that you can be totally sober and still have >5ng/mL of THC metabolites in your blood...

And who is coming up with this arbitrary limit of 5ng/mL... scientists or politicians?
Has anyone mentioned this? Apparently it was recommendations from a study by CA NORML that produced the 5 ng/ml number being used.

The report is here: http://www.canorml.org/healthfacts/DUICreport.2005.pdf

Its a helpful read. It sounds like they're also saying that for a typical medium to strong dose, 3-4 hours are needed to eliminate impairment before driving. But this really needs to be made more clear, as no one has home blood-THC testing kits.
quetzal Reviewed by quetzal on . No more stoned driving -- Colorado is passing THC limits for DUI Colo. may set limits for driving after marijuana use - The Denver Post This is pretty fucked up... I believe the blood level is 5ng/ml. I need to do a bit more research, but I think if you're a fairly heavy smoker (i.e. a few times a day), then your levels are pretty much always going to be at this level or higher. So basically you won't be able to drive ever without risk of getting a DUI. Way to go Colorado!!! What is motivating this law? Is there really a problem with stoned Rating: 5