Marijuana-Related Car Crashes and Deaths Increase Where it is Legal, Studies Find

Canadian researchers say emergency department visits for cannabis-involved traffic injuries jumped 475 percent between 2010 and 2021.

Marijuana plants are pictured on a two-hectare plot of land during a military operation in Poncitlan, Mexico, on April 14, 2023. Ulises Ruiz/AFP via Getty Images

Marijuana use is increasingly linked to traffic crashes and injuries in markets where it is legalized, according to recent research.

A study by researchers from the University of Ottawa found that annual emergency department (ED) visits for cannabis-involved traffic injuries increased by 475.3 percent between 2010 and 2021 in Ontario, Canada.