new report shows that states that have legalized or weakened restrictions around high-THC marijuana, either for medical or recreational use, saw 32% more marijuana-impaired driving than states that have not adopted the same policies. …

“Research shows that marijuana can impair drivers in a variety of ways,” said AAA, which has conducted its own research backing this idea. “It can affect psychomotor functions such as attention, reaction time and coordination, but generally it appears to affect automated or routine driving more than tasks requiring conscious effort. Further, numerous laboratory-based studies have demonstrated that marijuana use impairs many aspects of cognitive and physical function that are necessary for safe driving.

“Marijuana can decrease car handling, can impair performance and attention while increasing reaction times, following distance and lane deviation,” AAA added. … [Many drivers now can’t stay in their lanes – editor]

Use among youth is also an issue.

“It is critical that these results impact future policy debates, especially since enforcement data shows that between 11 to 23 percent of recreational marijuana sold ends up in the hands of minors,” the DFAF report said.

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