A road traffic safety evaluation method based on a conflict extreme value

A technology for safety evaluation and road traffic, applied in traffic flow detection, complex mathematical operations, etc., can solve the problems of poor timeliness of safety evaluation methods and achieve high timeliness effect
CN109710892APending Publication Date: 2019-05-03HARBIN INST OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HARBIN INST OF TECH
Publication Date
2019-05-03

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Abstract

The invention discloses a road traffic safety evaluation method based on a conflict extreme value, and relates to a road traffic safety evaluation method. The objective of the invention is to solve the problem of poor timeliness of a safety evaluation method for traffic conflicts at the present stage. The method comprises the following steps: 1, selecting a traffic conflict index, and obtaining traffic conflict data according to the selected traffic conflict index; 2, constructing a block extreme value distribution model according to the traffic conflict data obtained in the step 1; the methodcomprises the following specific steps: 1, carrying out regional division on obtained traffic conflict data; 2, obtaining extreme value data of the zone group; 2, constructing a block extreme value distribution model; 2, estimating the block extreme value distribution model by adopting a maximum likelihood method to obtain parameters in the block extreme value distribution model; and 3, evaluating the traffic safety level based on the conflict extreme value distribution model in the step 2. The method is applied to the field of traffic safety evaluation.
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Description

technical field

[0001] The invention relates to a road traffic safety evaluation method. Background technique

[0002] The problem of road traffic safety has always been one of the important issues affecting the sustainable development of the world, which causes a large number of casualties and huge property losses every year. According to the statistics of the World Health Organization, road traffic accidents cause about 1.3 million deaths and more than 20 million non-fatal injuries in the world every year. In order to reduce road traffic injuries, it is necessary to reasonably evaluate the safety level of road traffic facilities, so as to find out possible problems and propose targeted improvement measures.

[0003] At present, the evaluation of road traffic safety level is mainly based on historical accident data. The safety evaluation indicators constructed mainly include accident rate per million vehicles, accident rate per million vehicle kilometers, casualty rate per...

Claims

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