Traffic lights at an intersection are defective or not operating. No appropriate replacement signs or other traffic controls are in place. How must you treat the intersection?

Correct answer: As an all-way stop: stop fully, then follow its yielding rules.

Why

When an intersection's traffic lights are defective or inoperative, behave as though stop signs control every approach unless appropriate replacement traffic control applies. Make a complete stop, yield to vehicles that reached the intersection before you and check for pedestrians and other conflicts. Follow a peace officer's directions if one is directing traffic. Do not simply slow down and treat the intersection as uncontrolled.

Verified against Code de la sécurité routière (Québec), official French consolidation · Intersections and right-of-way