In that particular section, a police officer, if he or she has suspicion that someone might have ingested alcohol while driving, can require someone to blow into this roadside device, and that suspicion is usually triggered by the faintest smell of alcohol on someone's breath while the officer is sticking his or her head through the window of your car.
Dans cet article-là, un agent de police qui soupçonne qu'une personne pourrait avoir consommé de l'alcool en conduisant peut exiger de celle-ci qu'elle se soumette à un alcootest.