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A Grading Method for Determining the Spatio-temporal Influence Range of Quasi-Ellipse Accidents

A technology of influence scope and accident, applied in the field of traffic safety, can solve the problems of mountain highway supporting traffic safety facilities, lack of traffic management facilities, frequent traffic accidents, etc.

Active Publication Date: 2022-05-20
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In particular, due to the complex terrain and special geological conditions of mountainous roads, there are many limit design indicators for road alignments; due to limited funds or construction conditions, the lack of supporting traffic safety facilities and traffic management facilities for mountainous roads has further led to frequent traffic accidents. send

Method used

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  • A Grading Method for Determining the Spatio-temporal Influence Range of Quasi-Ellipse Accidents
  • A Grading Method for Determining the Spatio-temporal Influence Range of Quasi-Ellipse Accidents
  • A Grading Method for Determining the Spatio-temporal Influence Range of Quasi-Ellipse Accidents

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Embodiment Construction

[0036] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0037] Such as figure 1 The method for determining the space-time impact range classification of a class ellipse accident includes the following steps:

[0038] S1. Determination of the impact duration of traffic accidents

[0039] S11: Traffic wave equation under the Van Aerde model

[0040] The present invention carries out accident duration research on the basis of Van Aerde model, and its calculation formula is as follows:

[0041]

[0042] In the formula: c 1 、c 2 、c 3 is an intermediate variable; k represents the density pcu / (km·lane); v f Indicates the free flow velocity km / h; v indicates the spatial average velocity km / h; v m Indicates the critical speed km / h; k j Indicates the blocking density pcu / (km·lane); q c Indicates the traffic capacity pcu / (km·lane).

[0043] Bring q=kv into it to get:

[0044] ...

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Abstract

The invention discloses a method for determining the classification and determination of the space-time influence range of an ellipse accident, which includes a duration model and a space influence range model. , to accurately measure the scope and degree of impact of traffic accidents on the road where the accident occurred and the intersecting roads. By adopting the above method, the present invention can accurately analyze the duration of each stage in the traffic accident, and visually display the impact of the traffic accident on surrounding roads.

Description

technical field [0001] The invention relates to the technical field of traffic safety, in particular to a method for grading and determining the space-time influence range of similar ellipse accidents. Background technique [0002] Highway is the main artery of my country's transportation, which undertakes a large number of passenger and freight transportation needs and plays an important role in my country's economic development. In particular, due to the complex terrain and special geological conditions of mountainous roads, there are many limit design indicators for road alignments; due to limited funds or construction conditions, the lack of supporting traffic safety facilities and traffic management facilities for mountainous roads has further led to frequent traffic accidents. send. For mountain roads, the degree of impact of traffic accidents is not only related to the current state of the accident, but also related to road network structure, traffic flow and other f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G08G1/01G08G1/123
CPCG08G1/0125G08G1/0137G08G1/123Y02T90/00
Inventor 王建军王赛卢霄娟李强马驰骋李冬怡宋明洋
Owner CHANGAN UNIV