进口单独放行方式下的干道双向绿波协调控制图解法

Graphical optimization method for bidirectional corridor progression under the signal design mode of split phasing

利用车辆运行的时空特征来解析干道绿波协调控制效果,能够深层地探索绿波协调设计的本质性原理。本文从绿波协调设计的原理出发,基于空间时距图几何元素的变换调整,提出了一种进口单独放行方式下的干道双向绿波协调控制图解法。构建了初始综合优化流程,实现了信号协调参数的初步优化设计,进一步提出了交叉口相序再优化判断准则、基于速度推进线旋转变换的公共信号周期再优化方法、基于优化判断矩阵的相位差再优化流程,并通过逐步迭代优化实现了信号相位相序、公共信号周期以及相位差的最终优化。案例分析表明,本文所提出的图解法能够快速地获得双向绿波带宽较为理想的协调控制优化方案。基于VISSIM的仿真分析表明,该方案的协调优化效果优于PBAND模型,且最终达到了正反向绿波带宽的最优值。该图解法具备设计流程清晰、优化空间连续、求解速度快的优点,同时能够获得较为理想的干道双向绿波协调优化效果,具有一定的工程应用价值。

Using the spatial and temporal characteristics of vehicle movement to analyze the control effect of the corridor progression,we can deeply explore the essential principle of progression design.Based on the progression design principle and the geometric elements’transformation in the time−space diagram,a graphical optimization method for bidirectional corridor progression under the split phasing design is proposed.The initial comprehensive optimization determines the initial coordinated design scheme,and the iterative optimization re-optimizes the signal phase sequence,signal cycle,and offset.The case study shows that the proposed graphical method can quickly obtain a coordinated control scheme for the corridor with significant bandwidths in both directions.Simulation analysis using VISSIM shows that the proposed graphical method brings an optimal progression effect better than the PBAND method.The proposed method has a straightforward design process,a continuous optimization space,and a fast solution speed,which leads to its certain engineering application value.