Testing for Marijuana-Impaired Driving Is About to Get a Whole Lot Easier

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This is just a tidbit, but it’s an interesting one. Here’s the background: Legalized marijuana, which is pretty obviously gaining ground steadily, leads to higher marijuana use (duh) and thus to higher rates of driving while stoned. Or does it? The problem is that THC remains in your system for a week or more after you’ve smoked a joint, so even if you test positive at a roadside stop it doesn’t necessarily mean that you’re stoned now—or even that you’ve smoked within the past day, let alone the past few hours. As a result, drivers who are perfectly safe run the risk of being unfairly convicted of impaired driving, while drivers who are stoned can often escape conviction if they have a good lawyer.

Today, Keith Humphreys passes along the news that this might be about to change. It’s from a study in the Journal of Analytic Toxicology:

The JAT paper evaluated a different approach which may resolve these problems: Oral fluid sampling. The driver suspected of impairment is mouth swabbed at roadside and the saliva is placed in a machine, which rapidly prints out a result. This technology is fairer than urinalysis because it is only sensitive to recent marijuana use rather than use that happened a day ago or a week ago.

Of the devices the researchers tested in the study, the Dräger Drug Test 5000 had the best results. Assuming it doesn’t cost a mint, this technology could be a breakthrough for law enforcement as well as an important civil rights protection for people suspected of drug-impaired driving.

Like I said, just a tidbit. But an interesting one, especially given the obvious trajectory of marijuana legalization in America. If this technology pans out, it makes studies of marijuana-impaired driving more feasible and it removes one more argument from the arsenal of anti-legalizers.

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SIX TRUTHS

Reclaiming power from those who abuse it often starts with telling the truth. And in "This Is How Authoritarians Get Defeated," MoJo's Monika Bauerlein unpacks six truths to remember during the homestretch of an election where democracy, truth, and decency are on the line.

Truth #1: The chaos is the point.

Truth #2: Team Reality is bigger than it seems.

Truth #3: Facebook owns this.

Truth #4: When we go to work, we're in the fight.

Truth #5: It's about minority rule.

Truth #6: The only thing that can save us is…us.

Please take a moment to see how all these truths add up, because what happens in the weeks and months ahead will reverberate for at least a generation and we better be prepared.

And if you think journalism like Mother Jones'—that calls it like it is, that will never acquiesce to power, that looks where others don't—can help guide us through this historic, high-stakes moment, and you're able to right now, please help us reach our $350,000 goal by October 31 with a donation today. It's all hands on deck for democracy.

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