What does a flashing red light signify at an intersection?

A flashing red light at an intersection signifies that drivers must treat it as a stop sign. This means that you should come to a complete stop at the light, ensuring that the intersection is clear before proceeding. This traffic control device is used to alert drivers to potentially dangerous conditions, similar to how a stop sign functions.

In this situation, it's critical for drivers to take the time to observe for any oncoming traffic, pedestrians, or any other obstacles before moving forward. The requirement to come to a full stop helps promote safety at intersections where visibility may be impaired or where other vehicles have the right of way.

The other options don't accurately reflect the actions required by a flashing red light. Slowing down and proceeding with caution or preparing to stop yield different interpretations that do not convey the necessity of a complete stop. Moreover, allowing right turns without stopping misses the essential action of stopping at the light. Understanding this rule is vital for ensuring your safety and the safety of others on the road.