Does expanding access to cannabis affect traffic crashes? County‐level evidence from recreational marijuana dispensary sales in Colorado

Abstract

This article examines the effect of recreational cannabis dispensary sales on traffic crashes by employing difference-in-differences model that exploits the variation in the timing of recreational marijuana dispensary entry across counties within Colorado. Using marijuana-related hospital discharge as a proxy for marijuana use, the results indicate a sizable rise in marijuana-related hospital discharges after the entry of retail cannabis stores. However, there is a lack of evidence that traffic crash incidents are affected by the entry. The preferred estimate suggests that, at 90% confidence level, a large increase in traffic crashes by more than 5% can be ruled out.

Cannabis Use Behaviors and Related Harms among Adults in Thailand by Sex Assigned at Birth and Age Groups

“…Self-reported motor vehicle accidents with prior cannabis use were virtually nonexistent among the study participants, which differed greatly from the findings in other studies [41][42][43][44][45] . This study findings were inconsistent with Thailand's high burden of road traffic injuries 46 .…”

Did the cannabis recreational use law affect traffic crash outcomes in Toronto? Building evidence for the adequate number of authorised cannabis stores' thresholds

“…Currently, the recently available evidence from the USA, Uruguay and Canada does not support a clear stance concerning the impact of CRUL on traffic-related outcomes at the ecological level, particularly with studies which focus on traffic outcomes without explicitly considering the presence of cannabis in road users [9,[15][16][17]. More work is thus required to understand how CRUL might affect different jurisdictions, particularly where restrictions vary over time, and in jurisdictions where drug-impaired driving may have been increased [18].…”