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A New GNB Model of Crash Frequency for Freeway Sharp Horizontal Curve Based on Interactive Influence of Explanatory Variables
Joint Authors
Wang, Xiao-fei
Li, Xin-wei
Yan, Ying
Pu, HuaQiao
Yao, Jiangbei
Source
Journal of Advanced Transportation
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-11-14
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Abstract EN
Crash prediction of the sharp horizontal curve segment of freeway is a key method in analyzing safety situation of freeway horizontal alignment.
The target of this paper is to improve predicting accuracy after considering the elastic influence of explanatory variables and interaction of explanatory variables on crash rate prediction.
In the paper, flexibility and elasticity are defined to express the elastic influence of explanatory variables and interaction of explanatory variables on crash rate prediction.
Thus, we proposed 6 types of models to predict crash frequency.
These 6 types of models include 2 NB models (models 1 and 2), 2 GNB models (models 3 and 4), one NB model (model 5), and one GNB model (model 6) with flexibility and variable elasticity considered.
The alignment and crash report data of 88 sharp horizontal curve segments from different institutions were surveyed to build the crash models.
Traffic volume, highway horizontal radius, and curve length have been assigned as explanatory variables.
Subsequently, statistical analysis is performed to determine the model parameters and conducted sensitivity analysis by AIC, BIC, and Pseudo R2.
The results demonstrated the effective use of flexibility and elasticity in analyzing explanatory variables and in predicting freeway sharp horizontal curve segments.
In six models, the result of model 6 is much better than those of the other models by fitting rules.
We also compared the actual results from crashes of 88 sharp horizontal curve segments with those predicted by models 1, 3, and 6.
Results demonstrate that model 6 is much more reasonable than the others.
American Psychological Association (APA)
Wang, Xiao-fei& Pu, HuaQiao& Li, Xin-wei& Yan, Ying& Yao, Jiangbei. 2018. A New GNB Model of Crash Frequency for Freeway Sharp Horizontal Curve Based on Interactive Influence of Explanatory Variables. Journal of Advanced Transportation،Vol. 2018, no. 2018, pp.1-9.
https://search.emarefa.net/detail/BIM-1181821
Modern Language Association (MLA)
Wang, Xiao-fei…[et al.]. A New GNB Model of Crash Frequency for Freeway Sharp Horizontal Curve Based on Interactive Influence of Explanatory Variables. Journal of Advanced Transportation No. 2018 (2018), pp.1-9.
https://search.emarefa.net/detail/BIM-1181821
American Medical Association (AMA)
Wang, Xiao-fei& Pu, HuaQiao& Li, Xin-wei& Yan, Ying& Yao, Jiangbei. A New GNB Model of Crash Frequency for Freeway Sharp Horizontal Curve Based on Interactive Influence of Explanatory Variables. Journal of Advanced Transportation. 2018. Vol. 2018, no. 2018, pp.1-9.
https://search.emarefa.net/detail/BIM-1181821
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1181821