The Identification of the Impact of Radius Ratio of Horizontal to Vertical Curves on Highway Safety
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摘要
This paper is focused on the identification of the impact of radius ratio of vertical to horizontal curves (RV/H) on highway safety. Highway alignment facilities and statistics of traffic accidents of six highways from Washington State have been analyzed. Our research shows that accident rate decreases with the increasing of RV/H as a whole and begins to keep a low level when the RV/H large enough (more than 14). And for safety reasons, RV/H should be at least larger than 10 in the segment of the coordination of the crest and horizontal curve. Our research results also show optimum RV/H should be between 14 to 22 if radius of horizontal curves (RHC) are less than 3000 feet, and the optimum RV/H should be larger than 14 If the RHC is more than 3000 feet. It is found that the accident rate is relatively high when the RV/H is below 6, which is not recommended. Our research results reveal that RV/H has important design guidance function. RV/H can be selected as a reasonable index in horizontal and vertical alignment coordination design.
关键词
Highway;Traffic crashes;Coordination of vertical and horizontal curve;Radius Ratio of Vertical to Horizontal curves (RV/H);Radius of horizontal curves (RHC)
报告人
Xiaofei Wang
South China University of Technology

Dr Xiaofei Wang is an associate professor in highway engineering at South China University of Technology. She has a Ph.D. in highway and railway engineering from Tongji University of Shanghai, a master’s degree and bachelor’s degree in highway and railway engineering from Chang’an university in Xi’an China. Dr Wang’s active research fields include road space alignment design theory and method, crash prediction models of highway alignment base on big data, Evaluation and management of road safety for new construction/renovation or expansion projections, etc. As Principal Investigator, she has manage over 2 national scientific research projects, 7 provincial and ministerial-level scientific research projects, and more than 20 technical service or consulting projects commissioned by projects. As a technical director, she has participated in 4 national projects. As a first or corresponding author, she has published over 30 peer reviewed journal articles,  Among them, there are 9 SCI papers and more than 10 EI papers. She has published two monographs. She serves as a reviewer for journals such as Traffic Injury prevention, Journal of Advanced Transportation, China Highway Journal, etc.
 

稿件作者
xiaofei wang South China University of Technology
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重要日期
  • 会议日期

    12月17日

    2021

    12月20日

    2021

  • 12月16日 2021

    报告提交截止日期

  • 12月24日 2021

    注册截止日期

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Chinese Overseas Transportation Association
Chang'an University
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