The colors of traffic lights — green, yellow (or amber), and red — serve specific purposes to regulate traffic flow and ensure safety on the roads:

1. Green: Green signifies permission to proceed. When the light is green, it indicates that vehicles can move forward safely through the intersection.
2. Yellow/Amber: Yellow (or amber) serves as a warning. It comes on before the light turns red, indicating to drivers that the signal is about to change. It’s a signal for drivers to slow down and prepare to stop if necessary, but they can proceed with caution if they’re already in the intersection.
3. Red: Red indicates that vehicles must stop. It’s used to halt traffic and allow vehicles from other directions to proceed safely. Drivers must come to a complete stop at the red light and wait until it turns green before proceeding.

These colors are universally recognized and help create a standardized system for traffic control, minimizing confusion and accidents on the roads. Additionally, the positioning of the colors (green at the bottom, yellow in the middle, and red at the top) helps drivers quickly distinguish between them, even from a distance.

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