Règles de la route

Before changing lanes, you should always:

Panneau routier de Colombie-Britannique — Check mirrors and look over your shoulder at the blind spot
Afficher la réponse et l'explication
Bonne réponse : B. Check mirrors and look over your shoulder at the blind spot

Mirrors cannot show the whole area beside your vehicle. A motorcycle, cyclist, or small car can hide in the blind spot. A quick shoulder check confirms the lane is clear.