How marijuana use affects road safety

- This November voters in some 20 states will decide on the issue of recreational use of marijuana.

The headline reads "Fatal Road Crashes Involving Marijuana Double" -- this according to a new study by AAA. The study looked specifically at drug tests and fatal crashes in Washington State, which saw the fatal crashes jump from 8 percent to 17 percent.

Robert Sinclair with AAA Northeast says there are more than health-related implications when it comes to marijuana legalization. Road safety is one of them.

The AAA study out of Washington State, one of the first states to pass recreational marijuana use, found that testing drivers THC levels to determine who is safe and who isn't -- as many states have tried to use are flawed -- potentially leading to unsafe drivers on the road. Others are being wrongfully charged with impaired driving because effects vary by user.

Dr. Carl Castagna, an addiction specialist in New York City, says marijuana negatively impacts judgment and depth perception.

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