Eighty (80) milligrams of alcohol per one hundred (100) millilitres of blood is the level of alcohol consumption for Canadian drivers.
The Criminal Code of Canada has a “line” as to what level of alcohol a driver can have in their blood system. If the police investigate the driver and learn that they have more that 80mgs of alcohol per 100 millilitres of blood the police may charge the driver with the criminal offence of driving over 80mgs.
Most people arrested for driving over 80 mgs had no idea they were putting themselves at risk. Having that second drink can put a driver over the legal limit, making them a criminal in Canada.