Berzerker
Deity
About 1/3 rd of the country has changed pot laws, largely for medicinal purposes. Accompanying most of these changes are attempts to establish a limit on THC in the blood akin to measuring the alcohol in drunk drivers. While Coloradans are currently relying on the cops to determine when a motorist is impaired, the legislature is trying to follow in the footsteps of other states by setting limits on THC.
Herein lies the catch: pot smokers are safer drivers than drinkers, they consistently show less impairment than the legal limit for drinking and driving. Various tests reveal pot smokers range from ~.03-.07 BAC depending on the dose, so how can they be considered more impaired than what's legal for alcohol users?
http://druglibrary.org/schaffer/misc/driving/driving.htm
This is from a '93 NHTSA paper
from another study about culpability:
http://norml.org/library/item/marijuana-and-driving-a-review-of-the-scientific-evidence
Herein lies the catch: pot smokers are safer drivers than drinkers, they consistently show less impairment than the legal limit for drinking and driving. Various tests reveal pot smokers range from ~.03-.07 BAC depending on the dose, so how can they be considered more impaired than what's legal for alcohol users?
http://druglibrary.org/schaffer/misc/driving/driving.htm
This is from a '93 NHTSA paper
THC's effects on road-tracking after doses up to 300 g/kg never exceeded alcohol's at bacs of 0.08 g%; and, were in no way unusual compared to many medicinal drugs' (Robbe, 1994; Robbe and O'Hanlon, 1995; O'Hanlon et al., 1995). Yet, THC's effects differ qualitatively from many other drugs, especially alcohol. Evidence from the present and previous studies strongly suggests that alcohol encourages risky driving whereas THC encourages greater caution, at least in experiments. Another way THC seems to differ qualitatively from many other drugs is that the former's users seem better able to compensate for its adverse effects while driving under the influence.
from another study about culpability:
There was a clear relationship between alcohol and culpability. In contrast, there was no significant increase in culpability for cannabinoids alone. While a relatively large number of injured drivers tested positive for cannabinoids, culpability rates were no higher than those for the drug free group. This is consistent with other findings.
http://norml.org/library/item/marijuana-and-driving-a-review-of-the-scientific-evidence