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Modeling Train Movements Through Complex Rail Networks

机译:通过复杂的铁路网络对火车运动进行建模

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Trains operating in densely populated metropolitan areas typically encounter complex trackage configurations. To make optimal use of the available rail capacity, some portions of the rail network may consist of single-track lines while other locations may consist of double- or triple-track lines. Because of varying local conditions, different points in the rail network may have different speed limits. We formulate a graphical technique for modeling such complex rail networks; and we use this technique to develop a deadlock-free algorithm for dispatching each train to its destination with nearly minimal travel time while (a) abiding by the speed limits at each point on each train's route, and (b) maintaining adequate headways between trains. We implemented this train-dispatching algorithm in a simulation model of the movements of passenger and freight trains in Los Angeles County, and we validated the simulation as yielding an adequate approximation to the current system performance.
机译:在人口稠密的大都市地区运营的火车通常会遇到复杂的轨道配置。为了最有效地利用可用的铁路通行能力,铁路网的某些部分可能由单轨线组成,而其他位置可能由双轨或三轨线组成。由于当地条件的变化,铁路网中的不同点可能具有不同的速度限制。我们制定了一种图形技术来对这种复杂的铁路网络进行建模。并且我们使用这种技术开发了一种无死锁的算法,用于以几乎最短的旅行时间将每列火车调度到目的地,同时(a)遵守每列火车路线上每个点的速度限制,并且(b)保持火车之间的适当车头距离。我们在洛杉矶县的客运和货运列车运动的仿真模型中实现了这种火车调度算法,并且我们对该仿真进行了验证,以得出与当前系统性能相当的近似值。

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