An adult who has held a licence for more than two years drives a private passenger car with no service subject to a lower limit. What general maximum blood alcohol level must they not exceed?

Correct answer

0.5 grams per litre.

The general limit is 0.5 g per litre of blood; the corresponding breath limit is 0.25 mg per litre. Article 20 sets lower limits for specified vehicles or services and during the first two years of holding a licence. Drivers under 18 have a zero limit. Being below the limit does not guarantee safety: avoid alcohol if driving.