Stoned Driver Crash Risk Grows as Legal Pot Spreads in the U.S.

  • Insurance group study links recreational weed to more crashes
  • Federal safety agency warns of growing toll of drugged drivers
Photographer: Patrick T. Fallon/Bloomberg
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As the push to legalize marijuana gains momentum, so is evidence that more permissive policies on the drug are putting motorists at risk.

The Insurance Institute for Highway Safety found, in a study to be released on Thursday, that traffic accidents are rising in states that have legalized recreational marijuana. That followed stark warnings from the National Transportation Safety Board, which on Tuesday issued several recommendations to combat drug-impaired driving.