arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2006.15549eess.SYcs.SY
收藏

基于估计排队时间的城市网络交通背压控制

Backpressure Control with Estimated Queue Lengths for Urban Network Traffic

Li Li, Victor Okoth, Saif Eddin Jabari

摘要:

背压(BP)控制最初用于通信网络中的分组路由。自从它第一次应用于网络流量控制,它经历了不同的修改,使其适合于交通问题,有希望的结果。这些BP变体中的大多数都是基于对整个网络中的交通状况的完全了解的假设,特别是队列长度(更准确地说,是交通量)。然而,它已被公认,准确的队列长度信息在信号交叉口是永远无法获得,除非在完全连接的环境。尽管互联汽车技术发展迅速,但我们离现实世界中的完全互联环境还很远。本文测试了BP控制的有效性时,不完全或不完善的交通条件的知识。我们结合BP控制与速度/密度场估计模块适合于部分连接的环境。我们将建议的系统作为BP估计队列长度(BP-EQ)。我们测试了BP-EQ对不同联网车辆渗透水平的鲁棒性,并将BP-EQ与原始BP(即,假设准确了解交通状况)、真实世界的自适应信号控制器以及使用具有现场校准数据的微观交通仿真的优化固定定时控制。我们的研究结果表明,与连接的车辆渗透率低至10%,BP-EQ可以优于自适应控制器和固定定时控制器的平均延迟,吞吐量和最大停止队列长度在高需求的情况下。

英文摘要:

Backpressure (BP) control was originally used for packet routing in communications networks. Since its first application to network traffic control, it has undergone different modifications to tailor it to traffic problems with promising results. Most of these BP variants are based on an assumption of perfect knowledge of traffic conditions throughout the network at all times, specifically the queue lengths (more accurately, the traffic volumes). However, it has been well established that accurate queue length information at signalized intersections is never available except in fully connected environments. Although connected vehicle technologies are developing quickly, we are still far from a fully connected environment in the real world. This paper test the effectiveness of BP control when incomplete or imperfect knowledge about traffic conditions is available. We combine BP control with a speed/density field estimation module suitable for a partially connected environment. We refer to the proposed system as a BP with estimated queue lengths (BP-EQ). We test the robustness of BP-EQ to varying levels of connected vehicle penetration, and we compared BP-EQ with the original BP (i.e., assuming accurate knowledge of traffic conditions), a real-world adaptive signal controller, and optimized fixed timing control using microscopic traffic simulation with field calibrated data. Our results show that with a connected vehicle penetration rate as little as 10%, BP-EQ can outperform the adaptive controller and the fixed timing controller in terms of average delay, throughput, and maximum stopped queue lengths under high demand scenarios.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑