What does it mean if a traffic signal is flashing red?

Answer: B — Come to a complete stop before proceeding

When a traffic signal is flashing red, it indicates that drivers must come to a complete stop before proceeding. This is similar to a stop sign; it requires you to treat the intersection as if it were controlled by one. Once stopped, you should check for other vehicles and pedestrians to ensure it is safe to continue. After ensuring the intersection is clear, drivers can then proceed with caution. The other options do not accurately describe the action required when encountering a flashing red signal. Proceeding with caution without stopping could lead to a traffic violation or an accident. Accelerating quickly is not a safe action at any traffic signal, especially one indicating a stop. Lastly, the notion that a flashing red signal is temporary and may turn green at any time can create confusion and compromise safety, as the correct procedure is to stop first regardless of the duration of the light.