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Congestion early warning method for expressway bottle-neck road segment

A technology for bottleneck roads and highways, which is applied in the field of early warning of bottleneck road congestion on expressways. It can solve problems such as the inability to obtain road traffic data, fixed installation positions, and narrow detection ranges, so as to avoid the use of physical detection devices, save costs, and The effect of improving operating efficiency

Inactive Publication Date: 2018-05-04
SHANGHAI YUNDI INFORMATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For the detection of congested road sections, the currently widely used detection methods mainly include geomagnetic coil detection, video detection, etc., but the installation position is fixed, the detection range is narrow, and the space coverage is low; in addition, data from Internet companies can also be used To confirm the congested road section, but the traffic data in the road section cannot be obtained

Method used

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  • Congestion early warning method for expressway bottle-neck road segment
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  • Congestion early warning method for expressway bottle-neck road segment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Embodiment 1: as figure 1 As shown, this embodiment specifically relates to a method for early warning of expressway bottleneck section congestion, which specifically includes the following steps:

[0053] 【step 1】

[0054] Collect the toll station data, inbound and outbound traffic data, and mobile phone signaling data of each inbound user in the selected area. The selected area here can be a provincial area, where the toll station data contains multiple fields, specifically Toll station information field and toll station flow data field;

[0055] Toll station information field, its description is as follows:

[0056] name

type

Is it empty

note

GSID

VARCHAR2(32)

Y

High-speed code table ID

wxya

VARCHAR2(12)

Y

route code

LXMC

VARCHAR2(150)

Y

route name

[0057] Toll station flow data field, its description is as follows:

[0058] name

type

Is it empty

note

N_EN...

Embodiment 2

[0115] Embodiment 2: This embodiment takes each high-speed traffic situation in a certain province in February 2015 as an example, in conjunction with each step in Embodiment 1 to illustrate:

[0116] According to the OD path table between each entrance and each exit of a provincial expressway, determine the path degree of each OD to all possible m paths, and find the path with the smallest path length. When the unique shortest path corresponding to each OD pair is determined, the following OD matrix and path table can be obtained:

[0117] field name

field meaning

SFZ_O

Starting point toll booth code

SFZ_D

terminal toll booth code

LINK_O

starting point code

LINK_D

end point code

SEQ

The serial number of the current road segment in the route

CBGLINK

Current segment code

[0118] According to the quality of data analysis, the number of effective toll stations is 343. Therefore, the theoretical ...

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Abstract

The invention discloses a congestion early warning method for an expressway bottle-neck road segment. The congestion early warning method comprises the following steps that data of all toll stations,flow data of vehicles which enter and leave from the stations and mobile phone signaling data of all users who enter the stations in a selected area are collected; OD matrix models of the toll stations and the road resistance coefficients of all paths in all OD pairs are established, and the optimal paths of all the OD pairs are determined; according to the collected mobile phone signaling data, the vehicle speed is evaluated, and the required time when the vehicles run to the bottle-neck road segment is calculated; the flow of the vehicles which reach the bottle-neck road segment in a specific time period is counted, and if the flow of the vehicles exceeds a traffic flow threshold valve of the bottle-neck road segment, congestion early warning is conducted. The congestion early warning method for the expressway bottle-neck road segment has the advantages that the mobile phone signaling data is used for evaluating the vehicle speed and the flow data of entrances of the toll stations, the flow of the vehicles which pass through the bottle-neck road segment in a certain time range is predicted, early warning can be conducted ahead of schedule, and the running efficiency of an expressway can be improved; application of physical detection devices such as ground sensing coils can also be avoided to a certain extent, and the cost is saved.

Description

technical field [0001] The invention belongs to the technical field of traffic congestion evaluation, and in particular relates to a method for early warning of bottleneck section congestion on expressways. Background technique [0002] In the past ten years, my country's trunk road infrastructure has achieved rapid development, road network operation management and service levels have been effectively improved, and expressway network operation and service work has made major breakthroughs. [0003] The evaluation of expressway operation analysis is conducive to strengthening the operation monitoring and scientific management of the national trunk road network, and can improve the emergency response ability and public service ability of highway emergencies. At the same time, with the rapid economic growth and the expansion of urban scale, the contradiction between the expressway network capacity and traffic demand has become increasingly prominent, and the resulting long-ter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08G1/01G08G1/065
CPCG08G1/012G08G1/065
Inventor 王恒张晖陈明威刘胜平朱景瑜陆俊贤
Owner SHANGHAI YUNDI INFORMATION TECH
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