WHY IT MATTERS: If you use cannabis medicinally and drive, better research into impairment testing could eventually replace unreliable THC blood level thresholds with assessments that more fairly and accurately reflect whether you are actually safe behind the wheel. CLINICAL OVERVIEW: As cannabis legalization continues to expand across the United States, research into how cannabis use affects driving performance remains critically underdeveloped, creating a significant gap between policy and patient safety evidence. New approaches to studying cannabis-impaired driving are essential because unlike alcohol, THC affects psychomotor function in highly variable ways depending on tolerance, dosing method, cannabinoid profile, and individual metabolism.
Arizona Senators Approve Measures to Criminalize ‘Excessive’ Marijuana Use While Driving
D.C. is tightening cannabis advertising to protect young people while Virginia is building a regulated market from scratch—both developments show cannabis policy is maturing toward responsible frameworks. Arizona state senators approved measures to criminalize ‘excessive’ marijuana levels while driving, establishing impairment thresholds for cannabis-intoxicated driving. The legislation represents the evolving challenge of setting scientifically valid DUI standards for cannabis, as THC metabolites persist in the body long after impairment fades.