Tunnel speed limit effects on traffic flow explored with a three lane model
Tunnel speed limit effects on traffic flow explored with a three lane model
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DOI：
10.1016/j.matcom.2021.11.016
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发表时间：
2021-11
期刊：
影响因子：
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通讯作者：
Zhengming Li;M. Smirnova;Yongliang Zhang;N. Smirnov;Zuojin Zhu
中科院分区：
文献类型：
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作者：
Zhengming Li;M. Smirnova;Yongliang Zhang;N. Smirnov;Zuojin Zhu
本文提出了一个三车道模型，探讨隧道限速对交通流的影响数值。该模型假设每条车道上的交通流有其自身的密度和速度，突出相邻车道间交通流的局部均匀性作用，使净换道率的表达比现有换道模型更为简单。隧道限速效应主要体现在隧道瓶颈对交通冲击形成的行程时间和密度阈值两个方面。基于三车道模型，建立了一个仿真平台，采用三阶Runge-Kutta格式处理时间导数项，采用五阶加权基本无振荡格式计算数值通量。仿真结果表明，隧道限速越高，交通冲击形成的密度阈值越大，但平均行程时间和隧道平均行程时间越短。
This paper presents a three lane model to explore tunnel speed limit effects on traffic flow numerically. The model assumes traffic flow on each lane has its own density and speed, highlights the role of local homogeneity of traffic flow between adjacent lanes to express the net lane-changing rate more simply in comparison with the existing lane-changing modules. The tunnel speed limit effects involve in the aspects of travel time and density threshold of traffic shock formation due to the tunnel bottleneck. Based on the three lane model, a simulation platform is built that uses a 3rdorder Runge–Kutta scheme to handle time derivative term, and a 5thorder weighted essentially non-oscillatory scheme to calculate numerical flux. The simulation results show that the higher the tunnel speed limit, the larger the density threshold of traffic shock formation, but the shorter the mean travel time and tunnel mean travel time.