Stoned drivers are a lot safer than drunk ones, new federal data show

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new study from the National Highway Traffic Safety Administration finds that drivers who use marijuana are at a significantly lower risk for a crash than drivers who use alcohol. And after adjusting for age, gender, race and alcohol use, drivers who tested positive for marijuana  were no more likely to crash than who had not used any drugs or alcohol prior to driving.

 

The chart above tells the story. For marijuana, and for a number of other legal and illegal drugs including antidepressants, painkillers, stimulants and the like, there is no statistically significant change in the risk of a crash associated with using that drug prior to driving. But overall alcohol use, measured at a blood alcohol concentration (BAC) threshold of 0.05 or above, increases your odds of a wreck nearly seven-fold.

The study's findings underscore an important point: that the measurable...

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http://www.washingtonpost.com/news/wonkblog/wp/2015/02/09/stoned-drivers-are-a-lot-safer-than-drunk-ones-new-federal-data-show/