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对四路环形交叉口单口放行方法进行了深入研究。以充分利用环形交叉口时空资源为目的,从相邻进口和环道梯形存车区域2方面,提出了2种优化的四路环形交叉口单口放行信号控制模型。并分别对2种优化信号控制模型的信号相位进行了协调设计,给出了相位协调时差计算的详细步骤,对原有周期模型进行了改进。在比较分析2种优化信号控制模型延误的基础上,对2种优化信号控制模型的适用条件作了初步探讨。最后以襄阳市襄城区檀溪路/长虹路四路环形交叉口为实例,验证了提出的优化信号控制模型的有效性。
The four-way roundabout single mouth release method conducted in-depth study. In order to make full use of the space-time resources of the roundabout, this paper presents two optimized single-port release signal control models of four-way roundabout from the aspects of adjacent import and trapezoid storage area. The signal phases of the two kinds of optimal signal control models are designed respectively. The detailed steps of phase-coordinated time difference calculation are given, and the original periodic model is improved. Based on the comparative analysis of the delay of the two kinds of optimization signal control models, the suitable conditions of the two kinds of optimization signal control models are preliminarily discussed. Finally, taking the four intersections of Tanxi Road and Changhong Road in Xiangcheng District, Xiangyang City as an example, the validity of the proposed optimization signal control model is verified.