National Newswatch

The federal government’s crackdown on drug-impaired driving has taken a big step forward, as the Justice Department is set to give its blessing to Canada’s first roadside saliva test.

Once in use, police officers will be able to swab a driver’s mouth to test for the presence of THC, the main psychoactive ingredient in cannabis.

Roadside saliva-testing devices were authorized by Bill C-46, a massive overhaul of Canada’s impaired driving laws that passed in June.

But before police could order any devices, a model had to be ap

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