Ontario G1 Knowledge Test — G1 Practice Question
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Accuracy —
Rules of the Road
Driving with a blood-alcohol concentration above what level is a Criminal Code offence in Canada?
Show Answer & Explanation
Correct Answer: B. .08 (80 mg/100 mL)
A BAC of 0.08 (80 mg/100 mL) is the federal Criminal Code threshold for impaired driving. Conviction results in a criminal record plus a minimum one-year licence suspension on a first offence. This applies across Canada regardless of province.
Why the other answers are wrong
- A..05 (50 mg/100 mL)0.05 is Ontario's warn range — provincial administrative sanctions apply, but not criminal charges.
- C..10 (100 mg/100 mL)0.10 is above the criminal threshold; the threshold was 0.08 in all Canadian jurisdictions as of the last major update.
- D..15 (150 mg/100 mL)0.15 is considered an aggravating factor in sentencing but is not itself a separate threshold; 0.08 is the criminal line.