How to design the traffic lights in Dalian?

The green light of the traffic lights in this place is 9 seconds countdown.

Dalian countdown signal lamp adopts intelligent technology, and SCOOT intelligent traffic signal control system is connected and upgraded, which overcomes the mechanical operation mode of ordinary countdown signal lamp and can automatically adapt to the traffic signal timing adjustment according to the traffic flow in a period of time;

It can also adjust the duration of the green light cycle of the signal lamp in real time according to the traffic flow change detected by the road detector, so that the system can identify and count down in the last 9 seconds of the green light operation without affecting the traffic control scheme.