Modeling the Impact of Vehicle Platooning on Highway Congestion: A Fluid Queuing Approach
Modeling the Impact of Vehicle Platooning on Highway Congestion: A Fluid Queuing Approach
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模拟车辆编队对高速公路拥堵的影响：流体排队方法
DOI：
10.1145/3178126.3178146
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
K. Johansson
中科院分区：
文献类型：
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作者：
Li Jin;Mladen Čičić;Saurabh Amin;K. Johansson
车辆编队是一项很有前途的技术，可以显著节省燃料和减少排放。然而，车辆队列对公路交通的宏观影响还没有得到很好的理解。在这篇文章中，我们提出了一个新的流体排队模型来研究宏观之间的相互作用的随机到达的车队和背景交通在高速公路瓶颈。该模型被视为随机切换系统，分析了两种实际相关的优先级规则：比例（或混合）优先级和分段优先级。我们提供了直观的稳定性条件，并获得了长期的平均长度和方差的队列的优先级规则的界限。我们使用这些结果来研究如何排队引起的拥塞随排队车辆的比例，以及它们的特性，如排内间距和到达率。我们的分析揭示了一个基本的权衡引起的排队到达的随机性，和效率增益，由于更紧密的排内间距。这自然会导致比例优先级优于分段优先级的情况。有些令人惊讶的是，我们的分析结果与基于更复杂的两类细胞传输模型的模拟结果一致。
Vehicle platooning is a promising technology that can lead to significant fuel savings and emission reduction. However, the macroscopic impact of vehicle platoons on highway traffic is not yet well understood. In this article, we propose a new fluid queuing model to study the macroscopic interaction between randomly arriving vehicle platoons and the background traffic at highway bottlenecks. This model, viewed as a stochastic switched system, is analyzed for two practically relevant priority rules: proportional (or mixed) and segmented priority. We provide intuitive stability conditions, and obtain bounds on the long-run average length and variance of queues for both priority rules. We use these results to study how platoon-induced congestion varies with the fraction of platooned vehicles, and their characteristics such as intra-platoon spacing and arrival rate. Our analysis reveals a basic tradeoff between congestion induced by the randomness of platoon arrivals, and efficiency gain due to a tighter intra-platoon spacing. This naturally leads to conditions under which the proportional priority is preferred over segmented priority. Somewhat surprisingly, our analytical results are in agreement with the simulation results based on a more sophisticated two-class cell transmission model.