Method for determining minimum safety radius of horizontal curve of double-lane road in plateau area

A technology of safety radius and determination method, applied in the directions of roads, roads, buildings, etc., can solve the problem of insufficient minimum radius correction, and achieve the effect of simple method

Active Publication Date: 2021-08-06
SOUTHEAST UNIV
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  • Application Information

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Problems solved by technology

Judging from the specific physiological and psychological conditions of the driver on the plateau, the correction of the minimum radius is not enough

Method used

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  • Method for determining minimum safety radius of horizontal curve of double-lane road in plateau area
  • Method for determining minimum safety radius of horizontal curve of double-lane road in plateau area
  • Method for determining minimum safety radius of horizontal curve of double-lane road in plateau area

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Embodiment 1

[0035] A typical two-lane road in the plateau area—National Highway 318 Linzhi City-Sejila Mountain Pass section was selected for field driving experiments. The experimental road section is two-way two-lane, with a lane width of 3.5m and a design speed of 40km / h. The starting elevation of the selected road section is 2979m, and the ending elevation is 4720m. The experimenters selected 10 young drivers who entered the plateau area for the first time (plateau acclimatization period ≤ 10 days) as experimental samples, including 7 males and 3 females, with an average age of 25.4 years and an average driving experience of 4.7 years; the two-lane road is It means that the width of the lane is 3.5m, and the whole road contains many flat curve sections. Such as figure 1 As shown, the calculation method of the minimum safety radius of the horizontal curve section of the two-lane highway in the plateau area mainly includes the following steps:

[0036] Step (1): Collect the speed, hea...

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Abstract

The invention discloses a method for determining the minimum safe radius of a horizontal curve suitable for a double-lane road in a plateau area. The method comprises the following steps: (1) acquiring vehicle speed, heart rate and electroencephalogram data of a driver driving on horizontal curve road sections with different altitudes and radiuses according to an on-site driving experiment; (2) performing sample entropy processing on the electroencephalogram and heart rate indexes of the driver, and extracting feature indexes of the electroencephalogram and heart rate indexes; (3) performing principal component analysis on the heart rate sample entropy and the electroencephalogram signal sample entropy to obtain a driver psychological load comprehensive evaluation index CISE; (4) constructing a regression model of the comprehensive evaluation index CISE and the horizontal force acceleration of the horizontal curve road sections in different altitude intervals; and (5) determining the threshold value of the comprehensive evaluation index through the Lagrange median theorem, and finally proposing the minimum safety radius threshold value of the double-lane road in different altitude intervals in the plateau region. The driving safety of highways in the plateau area is improved.

Description

technical field [0001] The invention relates to the technical field of road safety, in particular to a method for determining the minimum safe radius of a flat curve of a two-lane road in a plateau area. Background technique [0002] At present, the roads in plateau areas are mostly low-grade two-lane roads. Due to the influence of complex terrain conditions and engineering economic conditions, there are many sections of two-lane highways in plateau areas that are surrounded by mountains and valleys, and along streams and cliffs, which leads to a higher frequency of low-linear index sections of two-lane highways on plateaus. However, road sections with low linearity indicators are often accident-prone road sections. Statistics show that major traffic accidents on plateaus in my country basically occur on two-lane roads. Since the plateau low-pressure hypoxic environment has a certain negative impact on the psychophysiological conditions of drivers, the linear design safety ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C1/00
CPCE01C1/00E01C1/002E01C1/007
Inventor 陈飞余瀚林胡飞薄雾张平
Owner SOUTHEAST UNIV
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