What does a stale green light indicate for drivers?

A stale green light indicates that the light has been green for a considerable amount of time and is likely to change to yellow soon. This gives drivers a cautionary signal that they should prepare to stop, as the light's duration suggests it may switch to yellow shortly. Understanding this concept is crucial for safe driving, as it helps prevent accidents that can occur if a driver continues through an intersection without considering the possibility of the light changing. Recognizing the implications of a stale green light encourages attentive driving and prompts drivers to be proactive in their response to changing traffic signals.