What should a driver look for well ahead to anticipate a change in traffic signals?

A stale green light is an important indicator for drivers to anticipate potential changes in traffic signals. When a green light has been illuminated for a while, it may soon turn yellow or red. This is particularly crucial at intersections where a driver needs to make informed decisions about whether to proceed, stop, or prepare to yield to the upcoming signal change.

By recognizing the stale green light, a driver can take proactive measures, such as gradually slowing down or preparing to stop if necessary, rather than entering an intersection unprepared when the light changes. This awareness not only increases safety but also facilitates smoother traffic flow by reducing abrupt stops and starts.

In contrast, yield signs, flashing red lights, and stop signs signal specific actions only when they are directly encountered by the driver. They do not provide anticipatory information about changes in traffic signals, making a stale green light a more proactive choice for foreseeing changes in traffic conditions.