The design of traffic lights one formed by a main road and a branch roads converging points of intersection control system, detailed requirements are as follows: (1) the main trunk road, each of which is equipped with a green, yellow, red lights, two digital tube display. (2) the main, branch channels alternately to allow passage, each trunk release 60 s, branch trunk release each 30 s, in each time by the green light into red light in the process of transformation, the yellow light to light 5 s as a transition, and to reduce the time display.

traffic.qpf

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