When must you stop your vehicle?

Stopping your vehicle when you see a flashing red light is essential for ensuring safety on the road. A flashing red light indicates that you must come to a complete stop, similar to a stop sign. This signal is often found at intersections or in areas where there is a need to alert drivers to potential hazards or stop for a crossing pedestrian.

While stopping at a stop sign is also crucial, as implied by another choice, the requirement to stop at a flashing red light specifically emphasizes the need to respond to immediate traffic control signals for safety. The other options, such as stopping at every intersection or only when pedestrians are present, do not convey the same clear requirement as stopping for a flashing red light, which is a definitive cue for all drivers to halt.