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
CN102419905AActive Publication Date: 2012-04-18BEIHANG UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
BEIHANG UNIV
Publication Date
2012-04-18

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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.
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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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