The cause of the traffic lights, countdown to cancel

Traffic lights countdown to cancel?

At present, the urban traffic lights countdown timer to cancel work is ongoing, intelligent transportation will take its place.

Why want to cancel the traffic lights countdown?

Traffic lights countdown is according to the traffic situation of a cycle in a fixed time, fixed on an intersection traffic signal timing, regardless of road car more or less, a red light is fixed for 20 seconds or 30 seconds, may wait for a few red light have hard time crossing, may also have green light for a long, but there is no car.

And intelligent transportation is the application of "green wave". For popular science ~

What is a "green wave"?

"Green wave" is "the image of the light multipoint control technology", through the computer and communication technology will be connected to the Internet intersection signal control, adjusting and optimizing the continuous green light in turn, to a certain section of formation of "green zone". In layman's terms, is to all into several continuous intersection signal control, computer networking and according to the traffic scientific calculation, so as to achieve within a certain time lag, each intersection green light in turn, ideally, driving in the car on the route to the green light.

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