What is the setting time of the traffic light and the setting of the signal light system?

When we cross the road, we often think about how long the traffic lights change, how is the traffic lights controlled? Now I will tell you what the reason is.

The time setting of traffic traffic lights will be adjusted according to the variation of traffic flow 24 hours a day. Under normal circumstances, a traffic light can be set 

up to 12 time periods. Each time period takes different measures according to the traffic conditions. At present, most traffic traffic lights have been set for 10 time 

periods. 24 hours a day, the traffic volume is mainly divided into peak, Pingfeng, Ciping Peak, and early morning hours. The time at which these intersections occur 

at different intersections is also different. During these time periods, the traffic light seconds at the intersection are set differently. Of course, we will continue to 

fine-tune the actual situation of each intersection to meet the travel needs of different levels of traffic participants.

Traffic traffic lights are controlled by traffic signals.

The setting contents of the traffic signal control system mainly include: the setting of the phase of the intersection signal light, the size of the period, and the time 

(green signal ratio) of each phase, and the phase difference (green wave) of the upstream and downstream intersections. Different intersections determine the 

signal setting requirements of the intersection according to their different space conditions and lane distribution, and the position of the intersection in the entire 

road network structure. Of course, the specific arrangement of the external field facilities (the position and number of signal poles) at the intersection is also 

included. Put the position.