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Method for testing safety performance of unsignalized intersection by utilizing equivalent traffic conflict

A traffic conflict and safety performance technology, applied in the direction of traffic flow detection, etc., can solve the problems of poor accuracy of evaluation methods, different accident consequences, long cycle, etc., to achieve the effect of improving efficiency and accuracy, shortening time cycle, and improving traffic safety

Inactive Publication Date: 2012-07-18
HOHAI UNIV
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  • Claims
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Problems solved by technology

Due to the randomness of traffic accidents, the imperfection of the data system, the long cycle, and the unobservability of accidents, etc., the evaluation efficiency is low, and its role in the evaluation of intersection safety is limited; while the current methods of traffic conflict technology mainly focus on The method based on conflict points and conflict rates does not consider that different types of conflicts have different severity and cause different accident consequences, and the accuracy of the evaluation method is poor

Method used

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  • Method for testing safety performance of unsignalized intersection by utilizing equivalent traffic conflict
  • Method for testing safety performance of unsignalized intersection by utilizing equivalent traffic conflict
  • Method for testing safety performance of unsignalized intersection by utilizing equivalent traffic conflict

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Embodiment Construction

[0036] like figure 1 As shown, a method for evaluating the safety performance of a non-signaled intersection by using equivalent traffic conflict, the specific steps of the method are:

[0037] Step 1: Determine the types of traffic conflicts at intersections, including intersection conflicts, merge conflicts, and diversion conflicts, where,

[0038] Cross-conflict refers to the traffic conflict between two traffic flows in different directions due to cross-traveling and other behaviors.

[0039] Convergence conflict refers to the traffic conflict that occurs when two traffic flows in different directions merge into one traffic flow.

[0040] Diversion conflict refers to a traffic conflict that occurs when a traffic flow in one direction is divided into two traffic flows in different directions.

[0041] Step 2: Calculate the probability of each type of traffic conflict, let P 1 is the probability of cross-collision, P 2 is the probability of a confluence conflict, P 3 is...

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Abstract

The invention discloses a method for testing safety performance of an unsignalized intersection by utilizing equivalent traffic conflict, belonging to the field of managing road traffic. The method comprises the following steps of: firstly determining a generation type of traffic conflict of unsignalized intersection, namely intersection conflict, merging conflict and diverging conflict; and guiding different types of traffic conflict probability distribution and expected traffic conflict severity degree, obtaining practical hour conflict amount of an intersection by utilizing a VEVID (Vehicle Video Capture Data Collector) video processing software, constructing an equivalent traffic conflict amount of the intersection based on the obtained practical hour conflict amount as an index for testing the safety of the unsignalized intersection, and finally obtaining the tested grade of the safety of the unsignalized intersection through statistic analysis. According to the method for testing the safety performance of the unsignalized intersection by utilizing the equivalent traffic conflict, disclosed by the invention, time period of test can be favorably shortened, the efficiency and the precision of the test are improved, the degree of automation is high, no influence of personal factors exists, the reliability of the test is high, a large amount of data samples can be objectively and quickly obtained, and reliable data base is provided for probability statistic analysis.

Description

technical field [0001] The invention relates to a method for evaluating the safety performance of a non-signaled intersection by using the equivalent traffic conflict between vehicles, so as to quickly and accurately judge the safety level of the non-signaled intersection in a short period of time, in order to analyze the causes of accident-prone intersections and propose corresponding It provides scientific basis for improving countermeasures and belongs to the field of road traffic management. Background technique [0002] Traffic safety has become an important issue of common concern to all countries in the world. In recent years, due to the increase in the number of vehicles, the number of traffic safety accidents has also continued to rise. Traffic in all directions, its safety issues can not be ignored. Traffic conflict refers to two or more road users approaching each other at the same time and space under observable conditions, so that if either party does not take ...

Claims

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Application Information

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IPC IPC(8): G08G1/01
Inventor 袁黎郑长江
Owner HOHAI UNIV
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