经典干道协调控制信号配时数解算法的改进

Improvement of Classical Algebraic Method of Signal Timing for Arterial Road Coordinate Control

遵循最大绿波带设计理念,利用干道协调控制中的时距分析图,结合实际算例,对经典数解算法在理想交叉口间距取值范围的确定、通过带宽度的计算、最佳理想交叉口间距的选取、以及各交叉口相位差的设置上存在的问题进行深入剖析,提出了基于公共信号周期允许变化范围的理想交叉口间距取值范围确定法则,给出了一种新的通过带宽度计算方法,建立了一条新的最佳理想交叉口间距选取原则。算例分析表明,改进后的经典干道协调控制信号配时数解算法能确保干道协调控制系统获得尽可能宽的通过带宽度,计算得到的最佳公共信号周期与通过带宽度也更为准确有效。

Following the design principle of maximum green wave bandwidth and making use of the time-space diagram for arterial road coordinate control, many problems existed in classical algebraic method such as the determination of value range of ideal intersection distance, the calculation of green wave bandwidth, the selection of optimal intersection distance and the value of signal offsets were deeply analyzed through some practical examples. On the basis of detailed analysis, the value range of ideal intersection distance was determined by the allowable value range of common signal cycle, a new calculation method for green wave bandwidth was presented, and a new selection rule of optimal intersection distance was established. The examples effectively demonstrate that the improved classical algebraic method can make arterial road coordinate control system get green wave bandwidth as wider as possible and obtain optimal common signal cycle and green wave bandwidth mere practically and accurately.