There has been alot of advertising against drinking and driving, specifically, but how much advertising has there been about driving under the influence of drugs? According to Constable Deanna Alford, not much.

"Since there is already a difference between the two advertising campaigns, the perception of the two tends to be different," said Alford.

A police officer will enter into an impaired driving investigation the same way whether it's impairment by drugs, alcohol, or sleep deprivation.

Depending on what information the officer gathers during the investigation, such as the smell of drugs, empty beer bottles, or other signs of impairment, an officer may then enter into a more specialized investigation, such as impairment by drugs.

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