AAA has commissioned a study into the six states that currently permit blood testing of drivers’ THC levels to determine if they’re under the influence of marijuana, and has found that these tests have “no scientific basis.”
As of now, the six states with these laws define a certain THC threshold in the blood that if a driver tests above is labeled “under the influence,” and if below is labeled sober and free to go. However, the foundation says that it is impossible to set a definitive limit for all drivers, and if these current laws remain in place, many unsafe drivers could be let go while perfectly safe drivers are wrongly convicted.
“There is understandably a strong desire by both lawmakers and the public to create legal limits for marijuana impairment in the same manner we do alcohol,” said AAA President and CEO Marshall Doney. “In the case of marijuana, this approach is flawed and not supported by scientific research.”
As of now there is no science into what content of THC defines impairment, as it varies so vastly in different people. A brand new user to marijuana could be impaired by a simple fraction that it would take to push a regular user over the limit. Furthermore, those who use marijuana regularly could always have a certain amount of THC in their systems as the chemical can remain present for days and even weeks after the last use.
NYU Professor Mark Kleiman told CBS News, “A law against driving with THC in your bloodstream is not a law you can know you are obeying, except by never smoking marijuana or never driving.”
AAA recommends that the states of Colorado, Montana, Nevada, Ohio, Pennsylvania, and Washington get rid of their current laws before even more states follow suit and continue to set a standard that is inherently flawed.
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