Description: The traffic lights at the normal timing control and emergency vehicle through two control methods. Start switch is turned on, the traffic signal timing diagram, and in all directions of red, yellow, green on-time countdown display. Emergency vehicle to emergency vehicle pass switch according to the time, regardless of the original state of the lights shall be forced to let the emergency vehicle to drive the direction of the green light, so that the release of emergency vehicle until the emergency vehicle by far.
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jiaotongdengkongzhi.Uv2
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