不列颠哥伦比亚省变速限制系统的安全性评价

IF 2.4 3区 工程技术 Q3 TRANSPORTATION
Mohamed El Esawey, Joy Sengupta, John E. Babineau, Emmanuel A. Takyi
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引用次数: 1

摘要

摘要本研究报告了在加拿大不列颠哥伦比亚省(BC)的省道公路上安装可变限速系统(VSLS)的安全效益。VSLS是一种智能交通系统(ITS),旨在根据下游的运行状况和/或天气条件改变速度限制,从而提高高速公路的安全水平。该分析利用了在冬季发生的警察参与的严重车祸(即致命+受伤)。三个冬季可作为实施前阶段,三个冬季可作为实施后阶段。简单的前后对比分析结果表明,评价走廊冬季严重碰撞(WSC)的发生频率和发生率分别降低35.8%和36.8%。为了确保结果的可靠性,还进行了前后的经验贝叶斯(EB)安全性评价。EB分析显示WSC总体降低34.4%。对该系统进行了经济评估,结果表明,实施VSLS的收益超过了系统成本,总收益-成本(B/C)比为4.3,净现值(NPV)为3441万加元。这项研究的结果可能会激励利益相关者,他们有兴趣追求类似的系统,以减轻与天气有关的安全挑战。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Safety evaluation of variable speed limit system in British Columbia
Abstract This study reports the safety benefits associated with the installation of Variable Speed Limit System (VSLS) on provincial highways in British Columbia (BC), Canada. A VSLS is an intelligent transportation system (ITS) that aims at increasing the safety level on highways by varying the speed limit according to downstream operational condition and/or weather conditions. The analysis made use of police-attended serious crashes (i.e. fatal + injury) that took place during winter seasons. Three winter seasons were available as a before-implementation period, and three winter seasons were available as an after-implementation period. The results of a simple-before-and-after showed overall reductions of 35.8% and 36.8% in winter serious collision (WSC) frequency and rate, respectively, were found for the evaluation corridors. An Empirical Bayes (EB) before-and-after safety evaluation was also carried out to ensure that the results are reliable. The EB analysis showed an overall reduction of 34.4% in WSC. An economic assessment of the system was undertaken and the results showed that the benefits of implementing a VSLS exceeded the system cost with an overall benefit-cost (B/C) ratio of 4.3 and a Net Present Value (NPV) of C$34.41 million. The results of this study may motivate stakeholders who are interested in pursuing similar systems for mitigating weather-related safety challenges.
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来源期刊
CiteScore
6.00
自引率
15.40%
发文量
38
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