What are the meanings of different colors on a traffic light?

The different colors on a traffic light convey specific instructions to drivers and pedestrians. Here is what each color represents: Red: Stop. When the light is red, drivers and pedestrians must come to a complete stop and wait for the light to turn green before proceeding. Yellow (or amber): Caution. The yellow light appears before the red light to alert drivers to prepare to stop. It indicates that the light is about to change from green to red. Green: Go. When the light is green, drivers and pedestrians are permitted to proceed with caution, following the traffic rules and yielding to any other vehicles or pedestrians with the right of way.