A flashing yellow beacon above an intersection serves what purpose?

A flashing yellow beacon above an intersection is specifically designed to warn drivers to approach the area with caution. When you see a flashing yellow light, it indicates that you should slow down and be prepared to yield to any potential hazards, such as pedestrians crossing or vehicles that may not have a stop signal. This is particularly important in intersections where visibility may be limited or where there is an increased likelihood of unexpected situations arising.

The other options do not accurately reflect the purpose of a flashing yellow beacon. For example, a closed intersection would typically be indicated with a different kind of sign or signal. A flashing yellow light does not indicate that a traffic jam is imminent or that speed limits are increasing; rather, it is a clear warning to encourage careful and attentive driving in that area.