What does a flashing red traffic light mean?

Answer: B — Stop and proceed when safe

A flashing red traffic light signals that drivers must come to a complete stop at the intersection. This is similar to the instructions for a stop sign, emphasizing the importance of yielding to any other vehicles or pedestrians before proceeding. Once stopped, a driver may only continue through the intersection when it is safe to do so, ensuring that they have checked for oncoming traffic and have a clear path. This rule is in place to enhance safety at intersections where the traditional traffic signal may not adequately control the flow of vehicles, especially at times of high traffic or unusual circumstances. It's essential for drivers to recognize the need for vigilance when they encounter a flashing red light, as it indicates that other road users could be moving at the same time.