The role of traffic signs and traffic lights

If there are traffic signs at the intersection, the situation will be completely different. After setting the countdown to the integrated traffic lights, the driver's driving behavior on the entrance lane has now changed. Under the condition that the driver knows whether there is a difference in the driving behavior on the entrance of the intersection under the condition of the countdown, because the driver now knows the remaining green light time, he can base on the remaining green light time, the difference between the vehicle and the stop line Factors such as the interval, the speed of the vehicle, and whether there are other vehicles ahead, automatically adjust the speed of the vehicle to stop at the stop line or pass through the intersection before the green light is completed. Traffic lights manufacturers
Therefore, the driver can clearly and decisively make a correct judgment on whether to stop or not. This is the biggest difference between a countdown and no countdown at an integrated traffic signal control intersection. The observable fact is: when the driver decides to slow down and park, the vehicle will start to slow down at a distance from the stop line on the entrance road until it parks before the stop line; when the driver decides not to stop, the vehicle will start to slow down before the stop line. Will stick to the original speed, perhaps at the walking speed, so as to pass the stop line when the green light is completed at the latest. 
The existence of a yellow light signal is conditional, and a yellow light signal is not required under any circumstances. The driver's driving behavior on the entrance road at the signal-controlled intersection with a countdown has changed. On the entrance road at a signal-controlled intersection with a countdown, the driver will no longer see the "dilemma" of parking. Because there is no "dilemma", the integrated traffic signal color display at the signal-controlled intersection with a countdown should be similar to that of the pedestrian traffic signal, and no longer display the yellow light time. Traffic lights manufacturers
In the future, it may be possible to revise the road traffic safety laws and regulations to the meaning of the yellow light. At the skill level, the signal control intersection with a countdown should not set the yellow light time, and the green light interval time should be all the red time.