What does a yellow traffic light signal?

A yellow traffic light signals that a vehicle must prepare to stop. This warning indicates that the light is about to change to red, which means that vehicles should not proceed through the intersection. The primary purpose of the yellow light is to alert drivers to take appropriate action; this could mean slowing down and stopping safely if they are close enough to the intersection. Recognizing the meaning of a yellow traffic light helps ensure safety on the roads, as it allows time for vehicles to clear the intersection before the light turns red, reducing the risk of accidents.