First of its Kind Study Finds Virtually No Driving Impairment Under the Influence of Marijuana

As cannabis prohibition laws crumble seemingly by the day, it’s allowing more research to be performed on this psychoactive substance that has long been a part of the human experience.

The first study to analyze the effects of cannabis on driving performance found that it caused almost no impairment. The impairment that it did cause was similar to that observed under the influence of a legal alcohol limit.

“Once in the simulator—a 1996 Malibu sedan mounted in a 24-feet diameter dome—the drivers were assessed on weaving within the lane, how often the car left the lane, and the speed of the weaving. Drivers with only alcohol in their systems showed impairment in all three areas while those strictly under the influence of vaporized cannabis only demonstrated problems weaving within the lane.

Drivers with blood concentrations of 13.1 ug/L THC, or delta-9-tetrahydrocannabinol, the active ingredient in marijuana, showed increased weaving that was similar to those with a .08 breath alcohol concentration, the legal limit in most states. The legal limit for THC in Washington and Colorado is 5 ug/L, the same amount other states have considered.”

As expected, there was impairment in all areas when alcohol and cannabis were mixed. But cannabis itself, when taken in moderate amounts, seems to cause no significant driving impairment.

In fact, some would argue that it makes them drive safer or slower.

The study’s findings further illuminate the fact that alcohol is a much more dangerous drug than cannabis, and somehow the former is legal while the latter is not.

With cannabis being decriminalized across the country, law enforcement will be getting their “rules and regulations” in place for the driving masses. They should be based on science and not Reefer Madness mentalities.

Another important finding should deter any attempts to deploy instant roadside tests for THC-blood levels.

“The study also found that analyzing a driver’s oral fluids can detect recent use of marijuana but is not a reliable measure of impairment.

“Everyone wants a Breathalyzer which works for alcohol because alcohol is metabolized in the lungs,” says Andrew Spurgin, a postdoctoral research fellow with the UI College of Pharmacy. “But for cannabis this isn’t as simple due to THC’s metabolic and chemical properties.”

some info from:  The Free Thought Project  

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