Colorado DUI Laws Include Marijuana Impaired Driving

As marijuana becomes available for recreational use throughout Colorado, the Colorado Department of Transportation (CDOT) and the Colorado State Patrol (CSP) remind motorists that it is illegal to drive while impaired by marijuana. Similar to alcohol, there is an established impairment level in Colorado of five nanograms of active tetrahydrocannabinol

(THC)—the active psychoactive component of marijuana—per milliliter of whole blood. Driving while impaired by any substance is illegal and unsafe.

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