主支路交叉口设置信号的临界流量

Critical Traffic Volume of Traffic Signal Warrant at Major-Minor Intersections

为寻求主支路交叉口设置信号的临界流量依据,以可插车间隙理论和排队论为基础,用概率分析法证明了将多股主路车流看作一股车流的可行性,建立了主支路交叉口的平均延误模型.从交通效率的角度出发,对比交叉口信号设置前后的平均延误时间,针对常见的3种无信号交叉方式,得到了不同临界间隙下设置信号的临界流量曲线,为主支路交叉口的信号设置提供了理论依据.

The feasibility of regarding multiple traffic flows as one was demonstrated by probability analysis and gap acceptance theory. On this basis, a model of average vehicle delay was established by queuing theory to find the critical traffic volume of traffic signal warrant at major-minor intersections. Then, from the viewpoint of traffic efficiency, by comparing the average vehicle delays at major-minor intersection before and after signal control, the critical volume curves of traffic signal warrant were obtained for different critical gaps of three common cross patterns at unsignalized intersection. The results may provide a theoretical basis for signal setting at major-minor intersections.