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Route choice and traffic signal control: a study of the stability and instability of a new dynamical model of route choice and traffic signal control

机译:路径选择和交通信号控制:研究新的路径选择和交通信号控制动力学模型的稳定性和不稳定性

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摘要

This paper presents a novel idealised dynamical model of day to day traffic re-routeing (as traffic seeks cheaper routes) and proves a stability result for this dynamical model. (The dynamical model is based on swapping flow between paired alternative segments (these were introduced by Bar Gera (2010)) rather than between routes.) It is shown that under certain conditions the dynamical system enters a given connected set of approximate equilibria in a finite number of days or steps. This proof allows for saturation flows which act as potentially active flow constraints. The dynamical system involving paired alternative segment swaps is then combined with a novel green-time-swapping rule; this rule swaps green-time toward more pressurised signal stages. It is shown that if (i) the delay formulae have a simple form and (ii) the “pressure” formula fits the special control policy P0 (see Smith, 1979a, b), then the combined flow-swapping / green-time-swapping dynamical model also enters a given connected set of approximate consistent equilibria in a finite number of steps. Computational results confirm, in a simple network, the positive P0 result and also show, on the other hand, that such good behaviour may not arise if the equi-saturation control policy is utilized. The dynamical models described here do not represent blocking back effects.
机译:本文提出了一种新颖的理想化的日常交通改道动力学模型(由于交通寻求便宜的路线),并证明了该动力学模型的稳定性。 (动力学模型基于成对的替代链段之间的交换流(Bar Gera(2010)引入),而不是基于路线之间的交换流。)研究表明,在某些条件下,动力学系统在给定的近似均衡中进入了给定的连接集。有限的天数或步骤数。该证明允许饱和流充当潜在的活动流约束。然后,将包含成对的可替换分段交换的动态系统与新的绿色时间交换规则组合;该规则将绿色时间切换到更多的加压信号级。结果表明,如果(i)延迟公式具有简单形式,并且(ii)“压力”公式符合特殊的控制策略P0(请参见Smith,1979a,b),则组合了流量交换/绿色时间-交换动力学模型还以有限的步骤输入给定的一组连通的近似一致均衡。计算结果在一个简单的网络中确认了正的P0结果,并且另一方面还表明,如果使用等饱和控制策略,则可能不会出现这种良好的行为。此处描述的动力学模型不代表阻碍作用。

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  • 作者

    Liu R; Smith MJ;

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  • 年度 2015
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  • 原文格式 PDF
  • 正文语种 en
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