What does a flashing red traffic light signify?

A flashing red traffic light signifies that drivers must come to a complete stop and then proceed when it is safe to do so. This is similar to the requirements at a stop sign. The flashing red indicates a more urgent condition than a steady red light, as it alerts drivers to the need for heightened caution in areas where visibility or traffic conditions may be variable. After stopping, drivers must yield to any traffic or pedestrians before they can safely move forward.

In contrast, choices suggesting other responses misinterpret the flashing red light's requirements. For instance, "proceed with caution" may apply to a yellow light, indicating a need for careful driving rather than a full stop. "Prepare to stop" is more aligned with a yellow light, which serves as a warning that a stop might be necessary. Lastly, "yield to all traffic" does not encapsulate the direct action required, which is to stop first. Therefore, the proper interpretation of a flashing red light is to stop fully before proceeding safely.