Cuts from article... see link for full story...
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...The studies looked at police reports and insurance claims, finding crashes rose between 5.2 percent and 6 percent in states with legalized recreational marijuana compared to neighboring states where such use remained illegal.
...While those under the influence of alcohol tend to either be driving alone or with other adults, about 14 percent of those confirmed to be using pot had a child in their vehicle. That reflects the fact, he added, that marijuana use isn’t confined to evenings and other times when adults are more likely to drink — and abuse — alcohol....
Police have a particularly difficult challenge because of the way marijuana works in the body.... the psychoactive ingredient remains in the body for weeks...
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https://www.nbcnews.com/business/consumer/legalized-marijuana-linked-sharp-rise-car-crashes-n921511
