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Washington State Institute for Public Policy

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Publications

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Technical Report—Licensed Cannabis Retail Access and Traffic Fatalities
Open Publication PDF

Amani Rashid - September 2023

In November 2012, Washington State voters passed Initiative 502 (I-502), which legalized limited possession, private use, and commercial sales of cannabis for adults. In this report, we examined the relationship between greater access to licensed non-medical cannabis (NMC) retailers and the prevalence of fatal traffic collisions. We found that a lower average travel time to an NMC retailer is related to both a modest increase in the prevalence of total drivers involved in a fatal traffic collision and drivers who test positive for THC. These findings suggest that in areas with more cannabis use (as measured by easier access to legal cannabis retail), there are more drivers involved in fatal traffic collisions. We found no evidence that retail access relates to the prevalence of drivers who test positive for alcohol alone (BAC at least 0.08), or any amount of alcohol in combination with THC.

Download:   Report    Executive Summary  
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Legislation