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Congestion control method and system for multistage dynamic speed limit of expressway

A technology of expressway and dynamic speed limit, which is applied in the traffic control system of road vehicles, traffic control system, traffic signal control, etc., and can solve the problems of inability to realize multi-level dynamic speed limit of expressway and poor congestion mitigation effect , to achieve the effect of reducing vehicle flow and alleviating congestion

Active Publication Date: 2021-07-27
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the existing expressway control methods and systems only focus on single-section speed limit, that is, the speed limit is carried out when entering the congested section, and the multi-level dynamic speed limit of the expressway cannot be realized, and the effect of congestion relief is not good.

Method used

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  • Congestion control method and system for multistage dynamic speed limit of expressway
  • Congestion control method and system for multistage dynamic speed limit of expressway
  • Congestion control method and system for multistage dynamic speed limit of expressway

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Embodiment 1

[0034] This embodiment is used to provide a congestion control system for expressway multi-level dynamic speed limit, such as figure 1 As shown, the congestion control system includes a traffic flow detection device 1 , a variable speed limit sign 3 and a control unit 2 .

[0035] The expressway in the control area is divided into multiple sections by multiple sections, and the expressway between two adjacent sections is a section, and then the expressway trunk line is divided into links to realize the discrete management of the trunk line. Front and rear are defined according to the traveling direction of the vehicle, and the direction opposite to the traveling direction of the vehicle is front.

[0036] In this embodiment, each section is used as the basic management unit, and the result of the Link division of the expressway trunk line is specifically:

[0037] G = (D, E); (1)

[0038] In formula 1, G represents the division set of highway arterial lines; D represents the...

Embodiment 2

[0048] This embodiment is used to provide a congestion control method for expressway multi-level dynamic speed limit, and controls the congestion control system described in Embodiment 1 to work, such as image 3 Shown, described congestion control method comprises the steps:

[0049] S1: Receive the vehicle running data of each section collected by the traffic flow detection device 1; the vehicle running data includes the traffic volume of the section and the time point when each vehicle passes through the section;

[0050] S2: Discriminate the state of each section according to the vehicle driving data, and determine the non-smooth road section; the road section includes one or more of the sections;

[0051] Specifically, as an optional implementation, such as Figure 4 As shown, S2 may include the following steps:

[0052] S201: Determine the average driving speed of the vehicle in the section according to the time point when each vehicle passes through the section;

[0...

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Abstract

The invention relates to a congestion control method and system for multistage dynamic speed limit of an expressway. The congestion control system comprises a traffic flow detection device, a variable speed limit signboard and a control unit. A highway in a management and control area is divided into a plurality of sections by a plurality of sections, the traffic flow detection devices and the variable speed limit signboards are installed at the sections, the traffic flow detection devices are used for collecting vehicle driving data of each section within a preset time period, and the control unit judges the state of each section according to the vehicle driving data, determines a non-unblocked road section, and determines speed limit values of front n sections of the non-unblocked road section according to section traffic volume of the front N sections of the non-unblocked road section. The speed limit values of the front n sections of all the non-unblocked road sections are integrated, the speed limit of a variable speed limit signboard is updated, and dynamic speed limit management of multi-stage sections is performed by utilizing the variable speed limit signboard. The driving speed of the vehicles in the management and control area is controlled, the flow of the vehicles driving into the congested road section is reduced, and the traffic congestion condition of the expressway is relieved.

Description

technical field [0001] The invention relates to the technical field of intelligent traffic control and management, in particular to a congestion control method and system for expressway multi-level dynamic speed limit. Background technique [0002] Most expressway traffic control systems focus on the realization of road operation monitoring, fixed-point speed monitoring, traffic information release and other management services. There are defects in the management and control methods of discovering congested areas by manual inspection or other low-efficiency monitoring methods, releasing congestion information and dispatching police to evacuate traffic, which will lead to problems such as untimely release of congestion information, slow traffic evacuation, and high probability of secondary accidents. Based on this, a method and system for freeway traffic flow control has attracted the attention of researchers. Through the monitoring and management of freeway traffic flow, th...

Claims

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Application Information

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IPC IPC(8): G08G1/065G08G1/07G08G1/09G08G1/01
CPCG08G1/065G08G1/07G08G1/09G08G1/0104
Inventor 卢晓滕坤敏刘海青王海霞张治国盛春阳宋诗斌聂君
Owner SHANDONG UNIV OF SCI & TECH
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