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Estimating performance of traffic signals based on link travel times

机译:根据链接传播时间估算交通信号的性能

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Recent advances in communication and computing technology have made travel time measurements more available than ever before. In urban signalized arterials, travel times are strongly influenced by traffic signals. This study presents a novel method based on well-known principles to estimate traffic signal performance (or more precisely their major "through" movements) based on travel time measurements. The travel times were collected between signals in the field by using point-to-point travel time measurement technologies. Closed-circuit television cameras and signal databases were used to collect traffic demand and signal timings, respectively. Then, the volume/capacity ratio of major downstream signal movements was computed based on demand and signal timings. This volume/capacity ratio was then correlated with travel times on the relevant intersection approach. The best volume-delay function was found, along with many other functions, to fit the field data. This volume-delay function was then used to estimate volume/capacity ratios and, indirectly, a few other signal performance metrics. The method, called travel time-based signal performance measurements, was automated and displayed on a Google Map. The findings show that the proposed method is accurate and robust enough to provide necessary information about signal performance. A newly developed volume-delay function was found to work just slightly better than the Bureau of Public Roads curve. Several issues, which may reduce the accuracy of the proposed method, are identified, and their solutions are proposed for future research. Copyright (C) 2016 John Wiley & Sons, Ltd.
机译:通信和计算技术的最新进展使旅行时间测量比以往任何时候都更加可用。在城市的信号动脉中,交通时间受交通信号的强烈影响。这项研究提出了一种基于众所周知的原理的新颖方法,可以基于行进时间测量来估计交通信号的性能(或更准确地说,是其主要的“通过”运动)。通过使用点对点传播时间测量技术,在野外信号之间收集传播时间。闭路电视摄像机和信号数据库分别用于收集交通需求和信号定时。然后,根据需求和信号时序计算主要下游信号移动的体积/容量比。然后,在相关的交叉口方法上,将该体积/容量比与行驶时间相关联。找到了最佳的音量延迟功能以及许多其他功能,以适应现场数据。然后,使用该音量延迟函数来估计音量/容量比,并间接地估计其他一些信号性能指标。该方法称为基于行进时间的信号性能测量,已自动完成并显示在Google Map上。研究结果表明,所提出的方法足够准确,可靠,可以提供有关信号性能的必要信息。发现新开发的体积延迟功能的效果略好于公共道路局的曲线。确定了可能降低所提出方法的准确性的几个问题,并提出了解决方案以供将来研究。版权所有(C)2016 John Wiley&Sons,Ltd.

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