Tunnel effects on ring road traffic flow based on an urgent-gentle class traffic model

被引：0

作者：

Yongliang Zhang ^{[1
]}

M.N.Smirnova ^{[2
,3
,4
]}

Jian Ma ^{[1
,5
]}

N.N.Smirnov ^{[2
,3
,4
]}

Zuojin Zhu ^{[1
,2
]}

机构：

[1] Faculty of Engineering Science, University of Science and Technology of China

[2] Faculty of Mechanics and Mathematics, Lomonosov Moscow State University

[3] Moscow Center for Fundamental and Applied Mathematics

[4] Scientific Research Institute for System Analysis, Russian Academy of Sciences

[5] Naval Architecture and Civil Engineering, Jiangsu University of Science and Technology

来源：

Theoretical & Applied Mechanics Letters | 2021年 / 11 卷 / 04期

关键词：

Tunnel effects; Travel time; Density threshold; Ramp effects;

D O I：

暂无

中图分类号：

U491 [交通工程与交通管理];

学科分类号：

摘要：

To explore tunnel effects on ring road traffic flow, a macroscopic urgent-gentle class traffic model is put forward. The model identifies vehicles with urgent and gentle classes, chooses the tunnel speed limit as free flow speed to express the fundamental diagram in the tunnel, and adopts algebraic expressions to describe traffic pressure and sound speed. With two speed trajectories at the Kobotoke tunnel in Japan,the model is validated, with good agreement with observed data. Numerical results indicate that in the case of having no ramp effects, tunnel mean travel time is almost constant dependent on tunnel length.When initial density normalized by jam density is above a threshold of about 0.21, a traffic shock wave originates at the tunnel entrance and propagates backward. Such a threshold drops slightly as a result of on-ramp merging effect, the mean travel time drops as off-ramp diversion effect intensifies gradually.These findings deepen the understanding of tunnel effects on traffic flow in reality.

引用

页码：230 / 235

页数：6

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