Traffic signal is one of the common traffic control facilities on urban roads, playing an important role in guiding and managing the traffic flow of vehicles and pedestrians. As an intelligent traffic management tool, traffic signals play a key role in road safety and traffic flow efficiency.

I. Importance of Traffic Signal Lights

The setting of traffic signals is an important part of urban traffic management. Their existence and reasonable use can effectively reduce the occurrence of traffic accidents, improve the road capacity, and ensure the safety and smoothness of traffic. Traffic signals let drivers and pedestrians know when they can pass and when they should stop through clear instructions, thus effectively controlling traffic flow and reducing traffic congestion. Second, the working principle of traffic signals

Traffic signals are usually composed of red, yellow and green color signals. These signals through a certain time interval and sequence of cyclic display, to the different directions of the traffic participants to provide clear instructions. A red light indicates stop, a yellow light indicates warning and preparation, and a green light indicates passing.

The working principle of traffic signals is based on both timing and sensing methods. The timed method controls the display of signals through preset time intervals and is not affected by the actual traffic flow. The inductive method uses sensors to monitor the flow of vehicles and pedestrians on the road and adjusts the signal according to the real-time situation. This intelligent induction system can reasonably allocate the green light time according to the change of traffic flow and improve the road traffic efficiency.

Third, the contribution of traffic signals to road traffic safety

1, to provide clear traffic instructions: traffic signals through the red, yellow, green three colors of light, to provide traffic participants with clear action guidelines to reduce the occurrence of traffic accidents. Drivers and pedestrians can judge when they can pass according to the instructions of the signals, thus avoiding traffic conflicts and accidents.

2、Control traffic flow: Traffic signals control the size and speed of traffic flow and reduce the possibility of road congestion by reasonably allocating green light time. They can be adjusted according to traffic conditions to ensure smooth and orderly traffic.

3、Promote traffic civilization and compliance with traffic rules: traffic signals, as part of traffic rules, prompt traffic participants to develop the awareness and behavior of compliance with traffic rules. People form good traffic behavior habits and improve the civilization of road traffic under the guidance of traffic signals.