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Q: What is a traffic light?
A: A traffic light, also known as a traffic signal or stoplight, is a signaling device placed at intersections or road junctions to control and regulate the flow of vehicular and pedestrian traffic. It consists of red, yellow, and green lights that indicate when drivers and pedestrians should stop, proceed with caution, or go.

Q: What are the meanings of different colors on a traffic light?
A: 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.

• Standard Traffic Lights: These are the conventional traffic lights with red, yellow, and green lights in a vertical or horizontal arrangement.
• Pedestrian Traffic Lights: These lights feature additional signals specifically for pedestrians, such as a walking figure indicating it is safe to cross and a hand indicating it is not safe to cross.
• Countdown Traffic Lights: These lights include a countdown timer display, indicating the time remaining for a green or red light, helping drivers and pedestrians better anticipate the light change.
• LED Traffic Lights: These lights use light-emitting diodes (LEDs) instead of traditional incandescent bulbs, offering energy efficiency, longer lifespan, and brighter visibility.