The situation is completely different if you countdown at the intersection. With a comprehensive traffic light countdown, the driver's driving behavior in the entrance lane changes.
With the driver knowing whether there is a countdown or not and the driving behavior on the entrance road of the intersection is different, because the driver now knows the remaining green light time, he can automatically schedule the speed time based on the remaining green light, the interval between the vehicle and the dotted line, the speed of the vehicle, and whether there are other vehicles ahead in order to stop in front of the center break or through the intersection before the green light is completed.
As a result, drivers can clearly and accurately determine whether to stop or not, which is the biggest difference between counting down and not counting down at integrated traffic signal-controlled intersections. It can be observed that when the driver decides to slow down and stop, the vehicle will begin to slow down and move away from the carriage dashed line on the entrance road until it stops in front of the dashed line; when the driver decides not to stop, the vehicle will continue to travel at the same speed or increase its speed and pass the break line at the end of the green light at the latest.
The existence of the yellow signal is predicated and is not required under any circumstances. The driver's driving behavior at the entrance to a signal-controlled intersection with a countdown timer has changed. At the entrance to a signalized intersection with a countdown, drivers will no longer be in a "dilemma" of whether to stop or not.
Because there is no "dilemma", the color display of the integrated traffic light at signalized intersections with countdowns should be similar to the pedestrian light, and the yellow light time will no longer be present. In the future, the meaning of the yellow light may be revised at the level of long-range traffic safety regulations. At the skill level, yellow light timing should not be set at signal-controlled intersections with countdowns, and green light intervals should be considered as full red light timing.
