Traffic Light Introduction
A traffic light, also known as a traffic signal or stoplight, is a signaling device used to control traffic flow at intersections or pedestrian crossings. It consists of a set of colored lights mounted on a vertical pole or overhead structure, which indicate when vehicles or pedestrians should stop, proceed with caution, or have the right of way.
Key Components of a Traffic Light:
Red Light: The red light is positioned at the top of the traffic light and indicates that vehicles and pedestrians must come to a complete stop. It signifies "stop" and is used to control conflicting movements and allow safe crossings or turns for other directions.
Yellow (Amber) Light: The yellow light is located in the middle of the traffic light and serves as a warning signal. It indicates that the red light will be displayed shortly and alerts drivers and pedestrians to prepare to stop or clear the intersection before the light turns red.
Green Light: The green light is positioned at the bottom of the traffic light and signals that vehicles and pedestrians can proceed. It indicates that it is safe to move forward or cross the intersection, provided that the way is clear and there are no conflicting movements.
