What is the meaning of a "stale green light"?

A "stale green light" refers to a traffic signal that has been green for an extended period. When a traffic light remains green for a long duration, it can indicate that the light is not experiencing heavy traffic flow or that a change in light is imminent. Drivers often interpret this condition to mean that they should be cautious and prepared to stop, as the light may turn yellow or red soon.

Understanding the context of a stale green light is essential for safe driving since it alerts drivers to remain vigilant rather than proceed through the intersection without caution. In contrast, the other options present misunderstandings about the state of the traffic signal. A signal indicating an immediate transition to red or one that has just turned green conveys different implications for driver awareness, while a malfunctioning traffic signal suggests an entirely different scenario that requires specific responses from drivers.