基于等饱和度的交叉口信号搭接相位设计

Overlap Phase Design for Equal Saturation

传统的相位设计方法难以协调各流向间饱和度差异,交叉口时空资源浪费严重。搭接相位能有效缓解各流向间饱和度不均衡现象,提高交叉口运行效率。然而传统搭接相位设计模式单一,不能实现各流向间饱和度完全相等,绿灯空放现象不可避免。为此,引入合流相位,综合考虑合流相位、对称相位、单口相位三类基本相位形式,研究了各类搭接相位模式,分析了搭接相位设置对交叉口通行能力的影响。研究表明,搭接相位的设置并不会增加交叉口的通行能力损失,相反,由于相位间的合理衔接,提高了各流向的绿灯时间利用率,从而增加了交叉口的通行能力。

The traditional phase design method is difficult to coordinate the saturation differences between movements, resulting in waste of time and space resources at the intersection. Overlap phase can effectively alleviate the saturation imbalance between movements, improve the efficiency of the intersection. However, the traditional overlap phase design mode can’t achieve complete equal saturation between movements, the phenomenon of no vehicle with green light is still inevitable. Therefore, this paper introduces the confluence phase and considers three types of basic phase forms: confluence phase, symmetrical phase and single-approach phase. The generation modes of various overlap phases are studied, and the influence of overlap phase on capacity is analyzed. The research shows that the overlap phase does not increase the loss of capacity. On the contrary, due to the reasonable connection between the phases, the green time utilization of each movement is increased, thereby increasing the capacity of the intersection.