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Traffic-wave theory-based traffic influence area determining method of expressway accidents

A highway and sphere of influence technology, applied in the fields of traffic information and control, and intelligent transportation, to achieve the effect of low condition dependence, easy access, and simple traffic parameters

Active Publication Date: 2012-04-18
BEIHANG UNIV
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  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to propose a method for determining the traffic impact range of expressway accidents based on traffic wave theory in view of the deficiencies and actual needs in the existing research on the traffic impact range of expressway accidents

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  • Traffic-wave theory-based traffic influence area determining method of expressway accidents
  • Traffic-wave theory-based traffic influence area determining method of expressway accidents
  • Traffic-wave theory-based traffic influence area determining method of expressway accidents

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Embodiment Construction

[0023] The present invention will be further described in detail with reference to the accompanying drawings and embodiments.

[0024] like figure 1 As shown, a method for determining the traffic impact range of expressway traffic accidents based on traffic wave theory includes the following steps:

[0025] Step 1: Determine the traffic flow and traffic density on the expressway.

[0026] According to the design data of the expressway, the fixed traffic parameters such as the capacity and congestion density of the expressway are determined. Use fixed traffic information detectors such as ground sense coil detectors arranged on expressway roads to detect changes in the magnetic field of coil detectors when vehicles pass by on the expressway, and the detectors can calculate traffic flow, vehicle speed, vehicle time occupancy rate and length based on this Waiting for traffic parameters, obtaining road traffic information, processing the obtained traffic information data, and re...

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Abstract

The invention discloses a traffic-wave theory-based traffic influence area determining method of expressway accidents, which is used for determining space-time influence areas of traffic accidents after the traffic accidents happen on expressways without inlet and outlet ramps. The traffic influence area determining method comprises the following steps of: firstly determining traffic flow and traffic density of the expressways under different traffic conditions, drawing an expressway flow-density map, and then analyzing an accumulating and evanishing process of traffic waves in a process fromthe beginning of the accidents to the elimination of accident influence by using the traffic-wave theory, calculating a traffic wave speed of each stage, drawing a space-time evolution map of the traffic accidents, and finally determining influence time ranges and space ranges of the accidents in each stage. The traffic influence area determining method is simple and convenient and has good stability and high reliability; and according to the traffic influence area determining method, the influence area of the traffic accidents can be timely and accurately forecasted, and stable, timely and reliable traffic accident information can be supplied to the administrative department of the expressway, thereby the implementation efficiency of a rapid traffic accident disposing measure is improved.

Description

technical field [0001] The invention belongs to the field of traffic information and control, and relates to a method in the technical field of intelligent traffic, in particular to a method for determining the traffic influence range of expressway accidents based on traffic wave theory. Background technique [0002] Traffic accidents on expressways not only bring loss of life and property to people, but also cause large-scale traffic congestion, increase vehicle fuel consumption and exhaust emissions, and bring about energy consumption and environmental pollution. Once a traffic accident occurs on the expressway, part of the road will be occupied or closed, which will affect the normal operation of road traffic. Therefore, the location of the accident will become a traffic bottleneck, and the traffic capacity of the road will be reduced so that it cannot meet the traffic demand, resulting in traffic congestion. , increasing the possibility of secondary accidents. If the im...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08G1/00
Inventor 余贵珍王云鹏刘玉敏鲁光泉田大新
Owner BEIHANG UNIV
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