Continuous modeling method considering upstream and downstream linear design parameters of a road section

A design parameter, upstream and downstream technology, applied in computing, complex mathematical operations, electrical digital data processing and other directions, can solve problems such as limited data collection methods, fragmented highway alignment continuity, and difficult road operation index safety research, etc. achieve good applicability

Active Publication Date: 2019-05-21
TONGJI UNIV
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Problems solved by technology

However, limited by the means of data collection, researchers in the past could only collect part of the road alignment samples, and use the point velocity of the line section as the research object to build a regression model. Safety Research on Road Operation Index

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  • Continuous modeling method considering upstream and downstream linear design parameters of a road section
  • Continuous modeling method considering upstream and downstream linear design parameters of a road section
  • Continuous modeling method considering upstream and downstream linear design parameters of a road section

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Embodiment

[0034] Based on the design drawings of Yongji Expressway in Hunan Province, a 3D model of the road was constructed, a driving simulation experiment was carried out, and the road operation index change sequence of 38 valid driver samples was collected. Based on the experimental data, the defects of the existing prediction model based on point velocity are studied and analyzed, and a continuous modeling strategy is proposed in which the set of upstream and downstream alignment design parameters of the road section is used as the explanatory variable. When extracting the upstream and downstream linear parameters, respectively select the aggregation distance of 50m, 100m, 200m, 300m, 400m and 500m, and select the best aggregation distance of the operation index by comparing the goodness of fit of the prediction model. For the continuous variable speed, extract the mean value to build a multiple linear regression model, and build a mixed linear model with the driver as a categorical...

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Abstract

The invention relates to a continuous modeling method considering upstream and downstream linear design parameters of a road section, and is applied to the field of combined linear safety assessment and optimization. The method comprises: a road operation index change sequence of a driver sample is collected, and when upstream and downstream linear parameters are extracted, the optimal set metering distance of operation indexes is selected by comparing the fitting goodness of a prediction model; extracting a mean value from the continuous variable speed to construct a multivariate linear regression model, and constructing a hybrid linear model taking a driver as a classification variable based on the individual value of the driver of each variable; and according to model comparison and parameter estimation results, selecting an upstream and downstream set counting distance with an optimal fitting effect; and finally obtaining a model parameter estimation result.

Description

technical field [0001] The invention relates to the field of combined alignment safety evaluation and optimization, in particular to a continuous modeling method considering design parameters of upstream and downstream alignments of road sections. Background technique [0002] With the rapid development of expressway in our country, expressway traffic safety has been paid more and more attention by all walks of life. Highway design should be "people-oriented", and the design concept of considering the safety of road users has become more and more popular. However, the existing road design and safety evaluation specifications do not take the driver into consideration enough, and the constraints on the alignment design value are single, and there is no quantitative consideration of the impact of the road combination alignment on safety. At the same time, with the improvement of road networks at all levels in the eastern region of my country, the main construction area of ​​roa...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G06F17/18
Inventor 王雪松郭启明陈志贵
Owner TONGJI UNIV
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