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Method for predicting simple accidents on freeways

A technology for highway and accident prediction, applied in the field of traffic safety, which can solve problems such as uneven conclusions, failure to consider the impact of traffic volume, and failure to quantify changes in traffic volume.

Inactive Publication Date: 2010-09-08
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] As early as 1964, Solomon began to study the relationship between speed and safety, most of which discussed the relationship between speed and accidents, without considering the impact of traffic volume
Looking at home and abroad, most of the studies on the impact of speed and safety are discussing the relationship between operating speed, speed difference and accidents, without quantifying changes such as traffic volume, so the conclusions are not all strong. persuasive

Method used

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  • Method for predicting simple accidents on freeways
  • Method for predicting simple accidents on freeways
  • Method for predicting simple accidents on freeways

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0064] like image 3 , Figure 4 Shown is a horizontal and vertical example of a certain expressway. The annual average daily traffic volume of this expressway is 2,500 vehicles. According to the annual survey and statistics of this expressway, the proportion of large vehicles is 13%.

[0065] Step 1: Calculate the average turning angle of the horizontal curve

[0066] Ave _ angle = Σ | α i | n = 5 18 π + 1 3 π 2 = 11 36 π

[0067] Step 2:

[0068] vertical curve L 1 Length=10000*[2%-(-3%)]=500m

[0069] vertical curve L 2 Length=8000*4.5%=360m

[0070] The length of the road section=150+500+300+...

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Abstract

The invention relates to a method for predicting simple accidents on freeways, which can be used for predicting the occurrence number of traffic accidents on some road sections of freeways and belongs to the field of traffic safety. The traffic accidents are not only concerned with speeds and speed differences, but also are closely associated with traffic volume and horizontal and longitudinal line shapes. The invention establishes relational models comprising intersection angles of the accidents and horizontal curves, gradients of longitudinal slopes and the like by utilizing the method of statistical regression. Practice proves that the accident number predicted with the method can be preferably coincident with the actually occurred accident number, and therefore, the method provides reliable theories and basis for reforming accident areas, preventing the occurrence of the traffic accidents, and reducing the severities of accidents.

Description

technical field [0001] The invention is a simple accident prediction method for expressways, which can be used to predict the occurrence number of traffic accidents in a certain section of expressways, and belongs to the field of traffic safety. Background technique [0002] Statistics show that highways are the safest highways in the world, but the opposite is true in our country. According to Japanese statistics, the accident rate per 100 kilometers of its expressways is only 1 / 2 or 1 / 3 of that of ordinary highways, while the traffic flow is about 10 times that of ordinary highways; the statistical result of the United States is that its highways per 100 kilometers are The accident rate of kilometers is only 1 / 10 of that of ordinary roads, which is far better than that of Japan. In my country, the traffic flow of expressways is basically similar to that of foreign countries, or even lower than that of many countries. However, according to the statistics of the Traffic Adm...

Claims

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Application Information

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IPC IPC(8): G08G1/01
Inventor 贺玉龙钟连德孙小端陈永胜鲍兴建徐婷张杰侯树展王华荣王一祎连嘉王超
Owner BEIJING UNIV OF TECH