How long to abstain from pot before hitting the road? Alberta researchers tackle the question

Alberta researchers are trying to figure out how long you need to abstain from weed before getting behind the wheel.

The effects of alcohol on driving are easily measured but roadside testing for marijuana is still in the development phase.

With the federal government planning to legalize cannabis by July, researchers in Edmonton are aiming to study the effects of marijuana on users.

“So how much can you consume? Could you consume a gram in an hour and then wait an hour and drive? We don’t know the answer to that,” said Dr. Scot Purdon from the Department of Psychiatry at the University of Alberta.

Purdon is leading the study that will examine the effects of marijuana on users cognitive functions such as fine motor skills, attention span, distractibility

... read more at: http://www.cbc.ca/news/canada/edmonton/cannabis-impaired-driving-alberta-researcher-1.4484071

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