How Can Traffic Lights Ensure Traffic Safety?

Traffic lights play a vital role in traffic safety.
First, traffic lights provide clear instructions for the flow of traffic in different directions. The red signal light is a stop signal for vehicles and pedestrians, which can effectively avoid traffic conflicts in cross directions. At busy intersections, red lights prevent vehicles from entering the intersection, preventing serious accidents such as frontal and side collisions, while also ensuring that pedestrians have a safe time to cross the crosswalk.
The green light indicates traffic, and a reasonable green time setting can ensure that the vehicle passes through the intersection smoothly without causing excessive congestion. It is determined according to the traffic flow and road width and other factors at the intersection, and the green time is relatively long on the main road with a large traffic flow to dredge a large amount of traffic.
The yellow light serves as a transitional signal and plays a warning role. When the yellow light is on, the vehicle and pedestrian are informed that the signal light is about to change, the vehicle should be ready to stop, and the pedestrian should stop entering the intersection. This gives traffic participants enough time to react to avoid the danger of slamming on the brakes or starting suddenly.
Moreover, the modern traffic signal system is often intelligent. The sensor can detect the number of vehicles and pedestrians at the intersection, and dynamically adjust the signal length, making the traffic more efficient and orderly. At the same time, some specially designed traffic lights, such as sound prompt lights set for the blind, further ensure the traffic safety of special people.