Setting DUI Standards for High Driving Still Baffles Policymakers

Within the chasm dividing supporters of marijuana legalization from prohibitionists, lies an issue that most people seem to agree upon: detecting cannabis-induced impairment in drivers is complicated.

While techniques exist to measure cannabis levels in a person’s system exist, translating those numbers into an estimation of their relative effect on motor skills is still a challenge.

In the case of booze, if drivers’ blood alcohol content (BAC) is 0.08 percent or higher, the National Highway Traffic Safety Administration (NHTSA) deems that they’re too intoxicated to drive. The standard was adopted by Congress in 2000 and is generally accepted among law enforcement personnel, although on several occasions the National Transportation Safety Board (NTSB) has floated a request to lower the BAC even more, ruffling feathers in the alcohol industry.

In a report to Congress in July 2017, the NHTSA

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