Reserve Capacity of a Signal-Controlled Network Considering the Effect of Physical Queuing
Reserve Capacity of a Signal-Controlled Network Considering the Effect of Physical Queuing
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发表时间：
2007
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通讯作者：
C. Wong;S. Wong;H. Lo
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作者：
C. Wong;S. Wong;H. Lo
备用容量是信号控制系统常用的性能指标，可以通过最大化公共流量乘数来获得。瞬时过载在城市信号控制系统中非常普遍，高峰需求可能持续很短的时间。在传统的点排队模型框架中，假设沿着道路路段的容车能力为无穷大，可能会高估备用容量。更实际地，如果提供足够的绿色时间，车辆能够以空间队列的形式被阻挡并且完全消散。为了模拟物理排队的影响，采用信号化单元传输模型（CTM）和多相位信号优化算法被集成用于确定链接信号系统的备用容量。红色和绿色的开始时间及其持续时间是关键的决策变量。该问题是制定为一个二进制混合整数线性规划（BMILP），可以解决标准的分支定界例程。优化算法也被开发来加速求解过程。最后给出了一个短杆连接的交错连接的算例。
Reserve capacity is a commonly used performance indicator for a signal-controlled system that can be obtained by maximizing a common flow multiplier. Transient overloading is very common in urban signal-controlled systems in which the peak demand may last a very short period of time. The reserve capacity could be overestimated in conventional point queue modeling framework assuming infinite holding capacities along road links. More realistically, vehicles are able to be held up in the form of spatial queues and fully dissipated if sufficient green times are provided. To model the effect of physical queuing, a signalized cell transmission model (CTM) is employed and a multi-phases signal optimization algorithm is integrated for determining the reserve capacity of a linked signal system. Starts of red and green times and their durations are key decision variables. The problem is formulated as a Binary-Mix-Integer-Linear-Program (BMILP) that can be solved by standard branch-and-bound routines. Optimization heuristics are also developed to speedup the solution process. A staggered junction with short link connections is given as a numerical example for illustrations.