流量不对称“十”字交叉口信号相位设计方法研究

Intersection Signal Phase Design Method under Dissymmetry Flow

分析了流量不对称情况下对称流向放行相位方案的局限性。针对到达流量不对称的十字交叉口,运用经典的信号配时方法和延误模型计算对称流向放行和单进口放行2种相位设计方案下交叉口的平均延误,确定了不同交通需求情况下应选取的相位设计方案。结果表明,与对称流向放行方案相比,单进口放行方案在流量不对称系数较大时有一定的优越性。

The limitation of symmetry phase design under dissymmetry flow was analyzed. The average intersection delays under symmetry phase design and the design of each phase for an entrance were calculated based on typical signal timing and Webster model. Then, a comparison was made and different optimal phase splits were obtained within different traffic demand. The result of a case study shows that each phase for an entrance has some priority under high dissymmetry coefficient.