Study: Marijuana’s Impact On Driving Is Strain-Specific

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Study: Marijuana’s Impact On Driving Is Strain-Specific



It’s never a great idea to drive a motor vehicle while “impaired,” but only in certain circumstances is the act illegal.

And, according to a new study, drivers who use cannabis might not feel or perform as “impaired” as someone else who used the same amount, but a different strain.

In fact, some cannabis-using drivers might experience a “positive effect” on their driving performance (but try telling that to a traffic cop, or to an angry judge in traffic court).

Impairment is defined as a state of weakened or diminished function, but not all impairments are treated equally.

A driver awake for 20 hours or more drives with the same impairment as someone with a 0.08 blood-alcohol content—the legal limit in most states, and the result of a couple of beers for most adults—but tired drivers don’t face the same criminal penalties and social opprobrium.

But what about someone driving after using cannabis? It’s an issue that state legislatures and law-enforcement agencies continue to struggle with, even as more and more states legalize marijuana.

There’s no doubt that cannabis impairs—but how much, and how much is acceptable? The short answers are we don’t know, but state law doesn’t care. สล็อต เติม true wallet

Since cannabis metabolites—for now, the standard that judges “how much cannabis” is in a human body—are fat-soluble, they can remain detectable in human blood or saliva long after the psychoactive effects have worn off. That’s one reason why “marijuana breathalyzer” tests that quickly and conclusively measure a marijuana-using drivers’ impairment have proven elusive.

Nevertheless, many states have imposed limits of how much THC metabolites can be present in a driver’s blood—and some states have thrown out those limits after they failed to convince juries and judges in court.

Colorado, for example, used to impose a limit of 5 ng of THC per mL of blood, but after some drivers challenged that standard in court and won, the state now declares a marijuana-using driver impaired if they show impairment.

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