What does a yellow traffic light indicate?

A yellow traffic light serves as a crucial warning to drivers that the signal is about to change to red. The primary purpose of this warning is to promote safety and traffic flow. When a yellow light illuminates, drivers should prepare to stop, as the next phase of the traffic signal will indicate a halt in vehicle movement. This anticipation allows drivers to respond appropriately, ensuring they do not enter the intersection when the light has turned red, which could lead to accidents.

The idea behind this signal is to give drivers a brief opportunity to react, whether it means stopping safely if they are able or proceeding carefully through the intersection if they are too close to effectively stop. Therefore, understanding the function of a yellow light is vital for maintaining safety on the roads.