How is the traffic light is flashing? Change the traffic lights to light emitting diode

We often can see the lights flashing, intersection traffic lights at the end of the green light will flash, and hope for the two kinds of color flashing, - For the green light Role is as the yellow light, blinking warning crossroads vehicle or pedestrian traffic lights green end of the time. There is also a case

traffic lights flashing on a regular basis. At the crossroads, we often see the traffic light at the end of the green light flashing. We hope they will flash two colors - — One is green and the other one is yellow. Flashing function is warning the crossroads vehicle or pedestrian traffic lights green time is coming to an end. There is a situation in traffic lights countdown flashing, the rest of the indicator lamp light. The change of the traffic light is, in fact, the rule. Let's look at how it happened. The intersection traffic lights change requirements ( 1) North and south interchange of green light and things crossed the red light will be at the same time, about 30 seconds. ( 2) Several times between the north and the south interchange of yellow light is flashing, and things at the red light to continue on. ( 3) North and south interchange of red light and things at the green light at the same time, about 30 seconds. ( 4) North and south interchange of red light to light, and something crossed the yellow lights flashing several times. ( 5) , loop ( 1) Operation. Worthy of our attention is that the intersection traffic lights flicker of time is not fixed. It is controlled by a traffic signal controller. It can real-time analysis of intersection traffic through the situation, and through the analysis and adjustment, it is concluded that the best flashing traffic lights. This is the rule of traffic lights flashing mentioned today. Traffic lights shining example above applies only to some crossroads. More knowledge can be linked with ab type.