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Regional Traffic Control System and Method Based on Dynamic Random Traffic Flow Phase Difference Coordination Mechanism

A technology of random traffic flow and traffic control, applied in the field of intelligent transportation, to achieve good real-time performance, reduce traffic congestion, and reduce average vehicle delays

Active Publication Date: 2020-09-22
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems existing in the existing regional traffic control system, and propose a regional traffic coordination control system and method based on a dynamic random vehicle flow phase difference coordination mechanism. The intersection traffic flow and edge intersection traffic flow are two parts. By introducing a phase difference coordination mechanism, all intersections in the entire road network sub-area are associated, and then the HCM2000 vehicle delay model is improved to make it suitable for the fluctuation of traffic flow in the sub-area. situation

Method used

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  • Regional Traffic Control System and Method Based on Dynamic Random Traffic Flow Phase Difference Coordination Mechanism
  • Regional Traffic Control System and Method Based on Dynamic Random Traffic Flow Phase Difference Coordination Mechanism
  • Regional Traffic Control System and Method Based on Dynamic Random Traffic Flow Phase Difference Coordination Mechanism

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Embodiment 1

[0034] Such as figure 1 As shown, the present invention provides a regional traffic coordination control system based on a dynamic random traffic flow phase difference coordination mechanism. The system includes a sub-area coordination controller module, a sub-area signal coordination optimization module, a traffic state perception module, and a timing plan output Module, controlled traffic flow.

[0035] The function of the sub-area coordination controller module is to obtain the optimal timing plan and the corresponding system performance index through the sub-area signal coordination and optimization module, namely PI (Performance index). Compare the performance index of the current control scheme with the performance index of the scheme after adjusting the timing, and output each intersection timing scheme corresponding to the optimal performance index to the timing scheme output module.

[0036] The function of the sub-area signal coordination and optimization module is: acco...

Embodiment 2

[0109] According to the traffic information collected by the sensing module, the sub-area coordination controller module of the present invention combines the sub-area signal coordination and optimization module to find the respective optimal timing schemes for each intersection in the sub-area, including:

[0110] 1 Regional traffic signal optimization control model

[0111] According to the delay model and constraint conditions proposed above, it is assumed that N c Cycle, taking the sub-area composed of four intersections as the analysis object, such as Figure 4 As shown, with the minimum average delay of all motor vehicle flows in the analyzed sub-zone as the optimization goal, the establishment of the sub-zone traffic signal coordinated control optimization model is as follows:

[0112]

[0113]

[0114] In formula 2-13, PI represents the optimization objective function, d i, j, k Represents the average vehicle delay time of the k-th traffic flow in the j-th phase at the i-th i...

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Abstract

The invention discloses a regional traffic control system and method based on a dynamic random traffic flow phase difference coordination mechanism. The method comprises the following steps: step one,collecting traffic flow information on all lanes and at all intersections and the number of vehicles that stay from the last period of time on all lanes and at all intersections; step two, on the basis of traffic information collected by a sensing module, adopting, by a sub-region coordination controller module, an established sub-region signal coordination optimization module based on a dynamicrandom traffic flow phase difference coordination mechanism; step three, applying a final timing scheme of the control system to controlled vehicles through a timing scheme output module to enable thevehicles to run according to a control signal timing scheme; and step four, obtaining current system vehicle running conditions through a signal collection module, determining whether a condition ofa system expected sub-region vehicle average delay is satisfied, deciding that a current timing scheme is a sub-region road network optimal timing scheme at the moment if the condition of the system expected sub-region vehicle average delay is satisfied, otherwise, returning to the step one. The method reduces traffic congestion, quickly enables coordination of signal control at all intersections,and reduces average vehicle delays of a regional road network.

Description

Technical field [0001] The invention relates to a regional traffic coordination control system and method based on a dynamic random traffic flow phase difference coordination mechanism, and belongs to the technical field of intelligent traffic. Background technique [0002] Urban transportation system is the foundation of modern city development, and urban transportation control is an important part of modern urban intelligent transportation system. With the development of the urban transportation network and the continuous increase of traffic load, how to improve the traffic efficiency of the urban transportation network has become an urgent problem to be solved. Regional traffic coordination control technology is an effective way to solve this problem. Among the existing regional traffic coordination control technologies, some combine parallel learning technology to propose an adaptive traffic signal control scheme based on reinforcement learning, which uses the advantages of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G08G1/08G08G1/081
Inventor 罗杰胡海涛
Owner NANJING UNIV OF POSTS & TELECOMM
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