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

Yongliang Zhang; M.N.Smirnova; Jian Ma; N.N.Smirnov; Zuojin Zhu

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

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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.

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来源
《力学快报：英文版》 |2021年第4期|230-235|共6页
作者
Yongliang Zhang; M.N.Smirnova; Jian Ma; N.N.Smirnov; Zuojin Zhu;
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作者单位

Faculty of Engineering Science;

University of Science and Technology of China;

Hefei 230026;

China;

Faculty of Mechanics and Mathematics;

Lomonosov Moscow State University;

Moscow 119992;

Russian Federation;

Moscow Center for Fundamental and Applied Mathematics;

Moscow 119992;

Russian Federation;

Scientific Research Institute for System Analysis;

Russian Academy of Sciences;

Moscow 119992;

Russian Federation;

Naval Architecture and Civil Engineering;

Jiangsu University of Science and Technology;

Zhenjiang 215600;

China;

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原文格式 PDF
正文语种 chi
中图分类数学分析;
关键词
Tunnel effects; Travel time; Density threshold; Ramp effects;

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

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