What does a yellow traffic light indicate?

A yellow traffic light serves as a warning to drivers that the signal is about to change to red. This means that the driver should begin to slow down and prepare to stop if it's safe to do so. The intention behind the yellow light is to provide a clear indication that time is limited for clearing the intersection before the light turns red. It does not mean to maintain or increase speed, nor does it imply yielding to oncoming traffic or proceeding without caution. Understanding this rule is crucial for ensuring safety and compliance with traffic laws.