A priority evacuation control method for traffic congestion

The invention relates to a priority evacuation control method for traffic congestion and belongs to the field of intelligent traffic technology. The method comprises the steps of analyzing influence relations among the congested traffic flows according to the collected data of the traffic flows in real time, figuring out influence factors of evacuation priority of the congestion, judging the evacuation priorities of the congested traffic flows by employing the influence factors and BP neutral network, and performing optimization and coordination control of signal sequence, signal phase and green light time length. The control method realizes the rapid evacuation of the formed traffic congestion and accordingly solves the problems that a conventional signal control system does not perform the real-time analysis and determination of the evacuation priorities of the congested traffic flows, does not take full advantage of the evacuation priority for signal control and fails to evacuate the congested traffic rapi