Panneaux routiers

A solid yellow (amber) traffic light means:

Panneau routier de Ontario — The red light is about to appear — stop if you can do so safely
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Bonne réponse : B. The red light is about to appear — stop if you can do so safely

Yellow means 'prepare to stop.' You should stop if you can do so safely; if you are too close to the intersection to stop safely, continue through with caution. Accelerating on yellow is a major cause of intersection collisions.