Impact of dedicated lanes for connected and autonomous vehicle on traffic flow throughput
Impact of dedicated lanes for connected and autonomous vehicle on traffic flow throughput
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DOI：
10.1016/j.physa.2018.08.083
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发表时间：
2018-12
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影响因子：
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通讯作者：
Lanhang Ye;Toshiyuki Yamamoto
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文献类型：
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作者：
Lanhang Ye;Toshiyuki Yamamoto
本文提出了一个应用程序最近提出的方法来建模连接和自动驾驶车辆（CAV）在异构交通流，调查的影响，设置专用车道的CAVs对交通流吞吐量。介绍了一种基本的图表方法，揭示了在不同的CAV渗透率和需求水平下，为CAV设置专用车道的利弊。比较了不同CAV专用车道数和混合流情况下的交通流性能。仿真结果表明，在低CAV渗透率，设置CAV专用车道恶化的整体交通流吞吐量的性能，特别是在低密度水平。当CAV在混合流中占主导地位时，设置专用车道的优点也会降低。只有在中等密度范围内才能获得CAV专用车道设置的好处。CAV穿透率和CAV个体性能是决定CAV专用道性能的重要因素。CAV所能达到的性能水平越高，通过CAV专用车道的部署所获得的效益就越大。此外，通过对专用车道上的通用汽车设定比其他正常车道上的车辆更高的限速，可以提高通用汽车专用车道的性能。本文的工作为研究CAV专用车道对交通系统的影响提供了一定的思路，并有助于确定CAV专用车道的最佳数量。
This paper presents an application of a recently proposed methodology for modeling connected and autonomous vehicles (CAVs) in heterogeneous traffic flow, to investigate the impact of setting dedicated lanes for CAVs on traffic flow throughput. A fundamental diagram approach was introduced which reveals the pros and cons of setting dedicated lanes for CAVs under various CAV penetration rates and demand levels. The performance of traffic flow under different number of CAV dedicated lanes is compared with mixed flow situation. Simulation results indicate that at a low CAV penetration rate, setting CAV dedicated lanes deteriorates the performance of the overall traffic flow throughput, particularly under a low density level. When CAVs reach a dominant role in the mixed flow, the merits of setting dedicated lanes also decrease. The benefit of setting CAV dedicated lane can only be obtained within a medium density range. CAV penetration rate and individual CAV performance are significant factors that decide the performance of CAV dedicated lane. The higher level of performance the CAV could achieve, the greater benefit it will attain through the deployment of CAV dedicated lane. Besides, the performance of CAV dedicated lane can be improved through setting a higher speed limit for CAVs on the dedicated lane than vehicles on other normal lanes. This work provides some insights into the impact of the CAV dedicated lane on traffic systems, and helpful in deciding the optimal number of dedicated lanes for CAVs.