On Montréal Island in 2008, 1,961 drivers were stopped for driving under the influence of alcohol. These arrests resulted from roadside checks or police interventions after an officer had noticed erratic behaviour.
To reduce the number of motorists driving under the influence of alcohol, the SPVM sets up roadside checks at various times of the year.
In 2008, nearly 27,555 drivers were challenged at 190 roadside checks in which patrols investigated if they had consumed alcohol.
When a police officer suspects a driver of having consumed alcohol, the driver will be subjected to a breathalyser test to detect alcohol. Drivers who fail the test are arrested; those who pass it are released.
Intercepting drivers during patrols
The majority of people arrested for impaired driving are stopped because a patrol noticed their erratic driving. People under the influence of alcohol often do things that draw the attention of police officers, such as:
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