摘要
以T型交叉口为研究对象,提出了T型交叉口设置移位左转车道的设计方法,分析了路段预信号与交叉口主信号之间的协调关系。以最小车均延误为优化目标,建立了设置移位左转的T型交叉口信号配时参数优化模型,推导了交叉口延误计算模型。采用仿真,验证了方法的有效性,从移位左转车道长度方面分析了方法的适用性。分析结果表明,设置移位左转的T型交叉口在低流量、高流量状况下,交叉口车均延误分别下降18.2%、17.9%。移位左转车道长度在90m左右时为宜。
Taking the T-shaped intersection as the research object,a design method for setting up a shifted left-turn lane at the T-shaped intersection was proposed,and the coordination relationship between the pre-signal of the road section and the main signal of the intersection was analyzed.Taking the minimum average vehicle delay as the optimization goal,an optimization model for signal timing parameters of a T-shaped intersection with shifted left turns was established,and an intersection delay calculation model was derived.Simulation was used to verify the effectiveness of the method,and the applicability of the method was analyzed from the perspective of shifting the length of the left turn lane.The analysis results show that under low-flow and high-flow conditions at a T-shaped intersection with a shifted left turn,the average vehicle delay at the intersection is reduced by 18.2%and 17.9%respectively.It is appropriate when the length of the shifted left-turn lane is about 90 m.
作者
高苏
卢立红
赵子雪
GAO Su;LU Lihong;ZHAO Zixue(Shandong Transportation Institute,Shandong Jinan 250031 China)
关键词
交通工程
移位左转
T型交叉口
延误模型
仿真评价
traffic engineering
displaced left-turn
T-shaped intersection
delay model
simulation evaluation
