Rising MVA deaths among women signal shifting impaired driving risks

This 22-year national study analyzed 24,152 deaths from motor vehicle accidents (MVAs) associated with substance use between 1999 and 2020, revealing shifting patterns in who is most at risk. While overall mortality rates remained relatively stable at 0.46 deaths per 100,000 population, significant demographic disparities emerged, with women's mortality rates increasing by 3.04% annually, particularly among white women and those in the Western U.S. These findings suggest that impaired driving risks from substance use—including cannabis—are increasingly affecting populations that may not be the traditional focus of public health interventions.

Men continued to account for higher MVA mortality across all demographic groups, but the analysis identified concerning upward trends in specific populations: older men (age 65+) showed significant increases, while men in the Northeast experienced declines. The research underscores that substance use remains a substantial contributor to fatal traffic accidents, with cannabis being a documented factor alongside alcohol and other drugs. The study highlights how mortality patterns are shifting geographically and by age, suggesting that interventions targeting impaired driving prevention must evolve to address these changing risk profiles.

These findings carry important implications for cannabis users and policymakers: as cannabis legalization expands across states, understanding who is most vulnerable to substance-related driving fatalities becomes critical for public health planning. The research emphasizes the need for targeted, demographically inclusive strategies and better resource allocation to reduce preventable deaths from impaired driving, particularly among women and older adults who show rising mortality trends.