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Climbing lane traffic safety benefit calculation method based on inclination value matching

A calculation method and traffic safety technology, applied in the traffic control system, calculation, traffic flow detection of road vehicles, etc., can solve the problems of inaccurate acquisition of the net impact of climbing lanes, sample selection deviation, etc., to reduce the impact of confusion, The effect of improving accuracy

Pending Publication Date: 2020-01-31
HARBIN INST OF TECH AT WEIHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problem that the "net impact" of the climbing lane on traffic safety cannot be accurately obtained due to the existence of sample selection deviation when the traditional regression method is used to analyze the safety benefits of the climbing lane. Based on the idea of ​​propensity value matching, a method for calculating traffic safety benefits of climbing lanes is proposed.

Method used

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  • Climbing lane traffic safety benefit calculation method based on inclination value matching
  • Climbing lane traffic safety benefit calculation method based on inclination value matching
  • Climbing lane traffic safety benefit calculation method based on inclination value matching

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specific Embodiment approach 1

[0021] Specific implementation mode 1: Combination figure 1 To explain this embodiment, the specific process of the calculation method of the slope-climbing lane traffic safety benefit based on the trend value matching in this embodiment is:

[0022] Step 1. Collect, process and organize data, and determine the control group and control group samples;

[0023] Step 2: Build a propensity value model and predict the propensity value of all samples;

[0024] Step 3: Sample matching based on propensity value;

[0025] Step 4. Check the balance of confusion variables. If it passes, proceed to the next step, otherwise return to step 2.

[0026] Step 5. Calculation of traffic safety benefit of climbing lanes.

specific Embodiment approach 2

[0027] Specific embodiment two: This embodiment is different from specific embodiment one in:

[0028] In step one,

[0029] (1) Collect data

[0030] Collect traffic accident data from various highway and road administration departments, including the time (year / month / day) and location (driving direction and station number) of the accident. Collect traffic volume data of each section of the expressway (between two adjacent interchanges) from the expressway flow observation station, and collect expressway construction charts from the road design department to obtain the expressway horizontal and vertical line and cross-sectional design data.

[0031] (2) Processing data

[0032] According to the direction of the expressway, the curvature of the horizontal curve, the longitudinal gradient, the number of lanes, the design speed, the climbing lane, the tunnel (the tunnel influence area is within 100m before and after the entrance), the interchange and the service area (the overpass is wit...

specific Embodiment approach 3

[0038] Specific embodiment three: This embodiment is different from specific embodiment one or two in:

[0039] In step two,

[0040] The meaning of the propensity value is the probability of any sample in the sample population entering the control group (that is, setting the climbing lane). Before constructing the propensity value model, firstly define the “climbing lanes (1 if there is 1 and 0 if no)” as the control variable; select the variables that have potential influence on the setting of the ramp lanes or accidents, and define them as confusion variables. Since the presence or absence of a ramp lane in the sample is related to the confusion variable, a statistical model can be constructed in which the ramp lane is the dependent variable and the confusion variable is the independent variable. In view of the fact that the climbing lane is a dichotomous variable (only two values ​​are 0 and 1), the following binomial Logit model is constructed to predict the tendency value:

...

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Abstract

The invention discloses a climbing lane traffic safety benefit calculation method based on inclination value matching, and relates to a climbing lane traffic safety benefit calculation method based oninclination value matching. The method aims to solve the problem that when a traditional regression method is used for analyzing the safety benefit of the climbing lane, due to the existence of sample selectivity deviation, the net influence of the climbing lane on traffic safety cannot be accurately obtained. The method comprises the following steps: 1, collecting, processing and organizing data, and determining samples of a control group and a control group; 2, constructing a tendency value model, and predicting tendency values of all samples; 3, sample matching based on the inclination value; 4, checking the balance of the confusion variable, if the confusion variable passes the check, executing the next step, otherwise, returning to the step 2; and 5, calculating the traffic safety benefit of the climbing lane. The method is used in the field of road traffic safety, and is especially suitable for analyzing the influence of a certain specific factor on traffic safety.

Description

Technical field [0001] The invention belongs to the field of road traffic safety, and specifically relates to a method for calculating the traffic safety benefit of a hill climbing lane based on matching of inclination values. Background technique [0002] In the continuous uphill section of the highway in the hilly area, heavy vehicles often run at a significantly lower speed than other vehicles due to insufficient climbing performance, which reduces the capacity of the section and is not conducive to traffic safety. Set up ramp lanes on steep slopes to separate heavy vehicles from the traffic flow, which can reduce the impact of large vehicles on the traffic flow. However, as an engineering measure with relatively large technical difficulty and investment, the benefit-cost ratio of setting up a climbing lane and its contribution to safety need further study. [0003] At present, the few studies involving ramp lanes use simulation data to analyze the impact of a particular ramp l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q50/30G06F17/18G08G1/01
CPCG06F17/18G08G1/0125G06Q50/40
Inventor 侯芹忠霍晓艳冷军强赵伟宁杨昊
Owner HARBIN INST OF TECH AT WEIHAI
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