Active control method of oversaturated traffic situation at intersection group

Abstract

The invention provides an active control method of an oversaturated traffic situation at an intersection group, and aims to realize the active prevention of the oversaturated traffic situation at the intersection group. First, analysis is conducted to the traffic development situation. The possible traffic flow in the balanced dynamic situation of users and the ideal traffic flow of the optimal dynamic situation of a system are predicted based on the needs of the starting point and the ending point of a short time in the future on going out in variable time. Second, traffic signals are actively controlled and optimized. The information of the oversaturated intersection group which possibly occurs in a short time in the future, key crowded paths, recommended shut paths and the optimal transfer flow are extracted, a secondary optimal road network under the requirement of the expected optimal transfer flow is formed, and a signal control scheme is dynamically optimized through a vague matching method by integrating a historical traffic signal control strategy library. Finally, the traffic forecast information is generated. The travel choice behaviors of a driver are analyzed, the corrected value of the saturation of the possible flow of the key crowded paths is worked out by integrating the requirements on the expected optimal transfer flow, and the corrected value of the saturation of the possible flow of the key crowded paths and the saturation of the possible flow of the recommended shunt paths are released as traffic forecast information.

Description

technical field [0001] The invention relates to the field of traffic management and control, in particular to an active control method for oversaturated traffic situation in intersection groups. Background technique [0002] The key intersection groups of urban high-density road network are often affected by oversaturated traffic flow, and it is easy to form a road network intersection group congestion situation, manifested as vehicle queuing, fleet overflow, intersection group deadlock and other phenomena, which bring economic and environmental impacts. come loss. [0003] As the core technology of intelligent transportation system, traffic control has the function of evacuating congested traffic flow. However, most of the traditional traffic control systems in China are open-loop systems, which show that no matter how the traffic flow changes, the intersection only shows the characteristics of a signal timing scheme, which is powerless to the congested traffic flow. As a...

AI Technical Summary

Problems solved by technology

[0006] 1. The dynamic advantages of the traditional control system in the optimization of control measures are not enough;

[0007] 2. The feedback adaptive control system is too passive to adjust the signal control scheme according to the predicted results of the oversaturation situation, so as to balance the road network load and prevent the emergence and spread of large-scale congestion;

[0008] 3. Traditional traffic information release technology releases traffic information truthfully, and cannot guide road traffic to the desired direction;

[0009] 4. There is no application of traffic signal control optimization and traffic information release integration technology

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