Assuming the road intersection, a red-green-yellow three-color traffic control lights, and requirements: 1). The green light is that vehicles will be allowed to sneak, over 30 seconds, the green light is off, yellow light 2). 5 seconds after the yellow light, off, red light, vehicles to stop before the line. 30 seconds after the red light is off, yellow light 3) 5 seconds after the yellow light, off, green light, bright, vehicles that can use it, and so the cycle.

traffic.txt

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