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更多“某信号控制交叉口某车流方向具有如下特征：周期C = 60s，绿灯时间 G=27s，黄灯时间y = 3s，饱和车头”相关的问题
A、该车道基本饱和流量及其所属信号相位绿信比的乘积
B、该进口道饱和流量及其所属信号相位绿信比的乘积
C、该车道饱和度及其所属信号相位绿信比的乘积
D、该车道饱和流量及其所属信号相位绿信比的乘积
某污染源排放的SO2的量为80g/s，有效源高为60m，烟囱出口处平均风速为6m/s。在当时的气象条件下，正下风方向500m处的σy=35.3m，σz=18.1m，试求正下风方向500m处SO2的地面浓度。
1.请将以下英文材料翻译为中文 Vehicle-Actuated Signals require actuation by a vehicle on one or more approaches in order for certain phases or traffic movements to be serviced. They are equipped with detectors and the necessary control logic to respond to the demands placed on them. Vehicle-actuated control uses information on current demands and operations, obtained from detectors within the intersection, to alter one or more aspects of the signal timing on a cycle-by-cycle basis. Timing of the signals is controlled by traffic demand. Actuated controllers may be programmed to accommodate: • Variable phase sequences (e.g., optional protected LT phases) • Variable green times for each phase • Variable cycle length, caused by variable green times Such variability allows the signal to allocate green time based on current demands and operations. A proper clearance interval between the green & the red phases is also ensured. 2.绘制次干道优先半感应控制流程图，并简要说明其控制方法。 3.简要说明相比定时控制，感应控制有何优缺点。
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的周期为60s。
