Dynamic vehicle speed control model of edge rate in long tunnel sections

中国安全科学学报 Pub Date : 2020-03-28 DOI:10.16265/J.CNKI.ISSN1003-3033.2020.03.019

Z. Can, Wang Hong, LU Hua, Zhu Shunying, Xiao Wenbin

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引用次数: 1

Abstract

Currentlyꎬ when static edge rate is used for vehicle speed controlꎬ cycle length of edge rate period and total length of pavement corresponding to all vehicle speeds are fixedꎬ so it is not well ̄targeted and achieves no obvious effects in speed reduction. In order to make up for this defectꎬ a dynamic speed control edge rate model for tunnel segment was established with minimum vehicle speed dispersion as objective function based on the positive correlation between accident rate and vehicle speed dispersion. Thenꎬ speed control system of dynamic edge rate was installed in central section of long tunnel on expressways for intelligent linkage studies between dynamic edge rate and traffic flow. Finallyꎬ vehicle speeds with or without control system of dynamic edge rate were compared and analyzed. The results show that speed control system based on dynamic edge rate model for tunnel sections can effectively control it with overspeed ratio decreasing by 16􀆰 69%ꎬ 85 percentile speedꎬ average speed and speed standard deviation decrease by 6􀆰 67%ꎬ 7􀆰 96% and 13􀆰 45% respectivelyꎬ and its control effect is more remarkable than that of static edge rate.

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隧道长断面边率车辆动态速度控制模型

目前ꎬ采用静态边率进行车速控制时ꎬ边率周期周期长度和所有车速对应的路面总长度都是固定的ꎬ，针对性不强，减速效果不明显。为了弥补这一缺陷ꎬ基于事故率与车速弥散的正相关关系，以车速弥散最小为目标函数，建立了隧道段动态速度控制边率模型。在高速公路长隧道中段安装了ꎬ动态边率速度控制系统，进行动态边率与交通流的智能联动研究。最后ꎬ对有无动态边缘率控制系统的车速进行了比较和分析。结果表明，基于动态边率模型的隧道断面速度控制系统能有效控制隧道断面速度，超速比降低16􀆰69%ꎬ85百分位速度ꎬ平均速度和速度标准差分别降低6􀆰67%ꎬ7􀆰96%和13􀆰45%ꎬ，其控制效果比静态边率控制效果更显著。

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来源期刊

中国安全科学学报

CiteScore

1.30

自引率

0.00%

发文量

8733

期刊介绍： China Safety Science Journal is administered by China Association for Science and Technology and sponsored by China Occupational Safety and Health Association (formerly China Society of Science and Technology for Labor Protection). It was first published on January 20, 1991 and was approved for public distribution at home and abroad. China Safety Science Journal (CN 11-2865/X ISSN 1003-3033 CODEN ZAKXAM) is a monthly magazine, 12 issues a year, large 16 folo, the domestic price of each book is 40.00 yuan, the annual price is 480.00 yuan. Mailing code 82-454. Honors: Scopus database includes journals in the field of safety science of high-quality scientific journals classification catalog T1 level National Chinese core journals China Science and technology core journals CSCD journals The United States "Chemical Abstracts" search included the United States "Cambridge Scientific Abstracts: Materials Information" search included