In multi-class disordered traffic conditions, the presence of numerous classes of vehicles having different size and operational characteristics invalidates the behaviour of lane discipline. Each vehicle traverses through a series of both viable as well as accessible gaps created by other vehicles, thus defining a permeable medium. In this paper, a plausible way to incorporate the disordered behaviour on macroscopic traffic stream modelling is discussed. A new metric termed as traversable distance has been formulated for characterising this behaviour, based on field observations. Based on class-specific traversable distances that correspond to a set of incommensurate density measures, equilibrium speed functions have been redefined. Disordered stream behaviour significantly affects the scatter in the equilibrium speed–density relationship which is a key input to macroscopic traffic flow models. Results from the modified speed functions based on traversable distance proved that the proposed methodology could considerably explain the scatter observed in the fundamental diagram.

中文翻译：

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使用可穿越距离模拟多级无序交通流：类似于流体渗透率的概念

在多级无序交通条件下，存在大量具有不同尺寸和操作特性的车辆，使车道纪律的行为无效。每辆车都穿过由其他车辆产生的一系列可行的和可访问的间隙，从而定义了一种可渗透的介质。在本文中，讨论了一种将无序行为纳入宏观交通流建模的合理方法。基于实地观察，已经制定了一种称为可穿越距离的新度量来表征这种行为。基于与一组不相称的密度度量相对应的特定于类的可穿越距离，重新定义了平衡速度函数。无序的河流行为显着影响平衡速度-密度关系的分散，这是宏观交通流模型的关键输入。基于可穿越距离的修正速度函数的结果证明，所提出的方法可以很好地解释在基本图中观察到的散射。