What does a yellow light mean at an intersection?

A yellow light at an intersection serves as a warning signal indicating that a traffic light is about to turn red. This means drivers should prepare to stop if it is safe to do so. The purpose of the yellow light is to provide adequate time for vehicles to react, encouraging them to either stop before the intersection or, if they are too close to stop safely, to proceed through the intersection with caution. This rule helps to enhance safety by reducing the likelihood of accidents that can occur from sudden stops or trying to rush through a changing light. Understanding the function of a yellow light is crucial for safe driving practices at intersections.