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The phenomenon of forward and afterward propagation is analyzed, and queuing length is defined.
进一步分析了波的前向和后向传播现象，定义了排队长度。
The result shows that vehicular queuing length, delay and stop rate at intersections have significant gray correlation to signal cycle time.
通过对算得的各关联度进行比较，得出排队长度和延误两个指标都同周期时长有较大的灰关联关系。
A traffic flow wave theory is used to calculate queuing length according to different crowded level, crowded time and variant demand volume.
按照阻塞程度、阻塞时间及变动的需求流量等已知条件，采用车流波动理论推算排队向上游延伸的最远距离。
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