Effect of roadway access on traffic safety at adjacent intersection

被引：0
|
作者：
Zhang Q. [1 ]
Chen H. [1 ]
Zhou J.-B. [2 ]
Zhang M. [1 ]
Guo L. [2 ]
Yang R.-F. [2 ]
机构：
[1] College of Transportation Engineering, Chang'an University, Xi'an
[2] School of Civil and Transportation Engineering, Ningbo University of Technology, Ningbo
来源：
Zhejiang Daxue Xuebao (Gongxue Ban)/Journal of Zhejiang University (Engineering Science) | 2021年 / 55卷 / 04期
关键词：
Crash modification factor; Roadway access; Traffic safety; Two-stage clustering approach (TSCA); Urban intersection; Zero-inflated negative binomial model (ZINB);
D O I：
10.3785/j.issn.1008-973X.2021.04.014
中图分类号：
学科分类号：
摘要：
Roadway access CMF-values were effectively estimated based on the point cloud data of the accident coordinates in Yinzhou District, Ningbo in order to fill the gap in the quantitative assessment of the effect of the roadway access on the traffic safety at the adjacent intersection and complement the crash modification factor (CMF) of roadway access impacted on the adjacent intersection. An efficient method was presented, including a two-stage clustering approach (TSCA) for developing relationship among accidents, intersections, and roadway access close to the intersections, which is applicable for accurate identification of accident hotspots from large-scale point cloud data and the zero-inflated negative binomial model (ZINB) for influencing factor analysis. Results showed that TSCA accurately identified 24, 16 and 10 intersection accident hotspots according to 60, 70 and 80 accident frequency threshold, respectively. ZINB was applied to model the main influencing factors of the 24, 16 and 10 black factors identified by TSCA, respectively. CMF-values were estimated by 1.17, 1.19, and 1.20, respectively. Roadway access has a significant impact on the safety of the adjacent intersection and a more significant effect on the intersection with a higher accident rate. Copyright ©2021 Journal of Zhejiang University (Engineering Science). All rights reserved.
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页码：720 / 726and756
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