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Simulation of Operating Procedures and Infrastructure Changes in the Upper Mississippi Navigation System

机译：上密西西比导航系统的操作程序和基础设施变化的仿真

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We use discrete-event simulation to investigate the effects of proposed operational policies and infrastructure changes for a series of locks that create a seasonal bottleneck for commercial barge operations. Traffic scheduling rules derived from a nonlinear integer programming model are tested over highly time-varying traffic mixes and traffic intensities in the shipping season. With the simulation model, we show the impact of alternative priority shifting rules and identify traffic levels at which major infrastructural improvements are required. We identify self-regulating behavior of the system when it is under stress and see how stochastic phenomena mute the benefits of scheduling strategies inferred from deterministic optimizing models. Finally, we compare the benefits derived from infrastructure investments with highly different capital costs. The results are relevant to other transportation or service systems involving series of separated servers with bi-directional traffic flows, several classes of user or customer, random itineraries, and random transit time between servers.
机译：我们使用离散事件仿真来调查建议的运营政策和基础设施的影响，这是一系列锁定商业驳船运营的季节瓶颈的一系列锁的影响。从非线性整数编程模型导出的流量调度规则在运输季节中的高度时变交通和交通强度上进行测试。通过模拟模型，我们展示了替代优先级转换规则的影响，并确定需要主要基础设施改进的流量水平。我们在压力下识别系统的自我调节行为，看看随机现象如何迫使从确定性优化模型推断的调度策略的好处。最后，我们比较基础设施投资的益处，具有高度不同的资本成本。结果与其他运输或服务系统相关，涉及具有双向交通流，多个类别的用户或客户，随机行程以及服务器之间的随机传输时间的分离服务器。

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