Studies: Rise in Car Crashes Among States With Legal Marijuana

October 19, 2018

By Brett Molina

Car crashes were up as much as 6 percent in states where the recreational use of marijuana has been legalized, said two studies.

According to research from the Insurance Institute for Highway Safety and the Highway Loss Data Institute, the frequency of collision claims filed to insurers were higher in four states where marijuana is legal: Colorado, Nevada, Oregon and Washington.

The studies were presented Thursday Combating Alcohol- and Drug-Impaired Driving summit.

The Highway Loss Data Institute study focused on collision claims between 2012 and October 2017, and compared against four control states where marijuana remains illegal: Idaho, Montana, Utah and Wyoming.

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