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 e

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

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0033] Example 1:

[0034] This embodiment is used to provide a congestion control system for highway multi-stage dynamic speed limits, such as figure 1 As shown, the congestion control system includes a traffic flow detecting device 1, a variable speed signs 3, and a control unit 2.

[0035] The highway in the control area is divided into multiple sections, and the highway between the two crossings is a segment, and thereby performing a link division to the highway trunk, realizing trunk discrete management. According to the direction of travel of the vehicle, the opposite direction of the vehicle travel direction is before.

[0036] In this embodiment, the result of each segment is a basic management unit, and the result of the highway trunk line LINK is specifically:

[0037] G = (d, e); (1)

[0038] In the formula 1, g represents the highway trunk division collection; D represents a collection of link section, d = {D 1 , ... D m , ... D M }; E indicates that the section is set...

Example Embodiment

[0047] Example 2:

[0048] This embodiment is used to provide a congestion control method of a highway multi-stage dynamic speed limit, and control the congestion control system described in Example 1 for operation, such as image 3 As shown, the congestion control method includes the steps of:

[0049] S1: Receive vehicle travel data of each section acquired by the traffic flow detecting device 1; the vehicle travel data includes a cross-sectional traffic and a time point of each vehicle through section;

[0050] S2: Determine the state of each section according to the vehicle travel data, determine the non-smoked section; the road segment includes one or more of the segments;

[0051] Specifically, as an alternative embodiment, such as Figure 4 As shown, S2 may include the steps of:

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

[0053] S202: Discriminate the state of each segment a...

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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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