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Invited Commentary
June 22, 2020

Reducing Impaired Driving Fatalities: Data Need to Drive Testing, Enforcement, and Policy

Author Affiliations
  • 1Former Administrator, National Highway Traffic Safety Administration, Washington, DC
  • 2Zoox Inc, Foster City, California
  • 3Center for Injury Research and Policy, Department of Health Policy and Management, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
JAMA Intern Med. Published online June 22, 2020. doi:10.1001/jamainternmed.2020.1984

The 2 studies evaluating the association of recreational cannabis laws with motor vehicle crash deaths by Santaella-Tenorio et al1 and Kamer et al2 in this issue of JAMA Internal Medicine contribute to an emerging body of research necessary to inform policy on cannabis and impaired driving. Both studies use natural experiments in policy implementation to provide a high-level perspective of how legalization of recreational cannabis use may affect motor vehicle crash deaths in the population. Despite mixed findings, these studies provide much-needed research on cannabis use and driving while acknowledging that such retrospective analyses inherently lack precise control over the range of factors that can affect crashes across state populations during a period of time.

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