设置逆向可变车道的交叉口信号配时优化研究

Research on Lntersection Signal Timing Optimization with Setting Reversible Variable Lane

为了使逆向可变车道技术的信号配时更科学、应用更广泛,针对典型的平面十字型信号交叉逆向可变车道的设置进行研究。首先以实际交通调查数据为基础,研究设置逆向可变车道对饱和流率的影响,并定量分析了设置逆向可变车道的交通流变化,建立分阶段消散流率模型;然后优化相位相序,建立可变车道预信号配时参数模型,在确定相位相序和可变车道预信号配时参数的基础上依据流率时变规律对Webster最佳周期及绿信比算法进行修正。最后以济南市经十路舜耕路交叉口为交通背景,利用Vissim软件进行仿真验证,结果表明:改进的Webster配时模型可有效适应设置逆向可变车道的信号交叉口配时。

In order to make the signal timing parameters more scientific and its application more extensive, this paper deeply studies on the setting of reversible lanes in typical signalized cross intersections. Firstly, based on survey dates, the effect of reversible lanes on traffic flow is studied. Furthermore, the paper analyzes the change of traffic flow quantitatively after setting the reversible lanes and building the flow rate discharging model as the basis of signal timing. Then, the phase sequence is optimized, and the variable lane pre-signal timing parameter model is established. Based on the phase sequence and the variable lane pre-signal timing parameters, the optimal period and the green letter ratio of Webster are determined according to the flow rate time-varying law. At last, taking the intersection of Shungeng Road of Jinan City as the traffic background, the validity of the model is verified and it proves that the improved Webster timing model can be used to set the timing of signalized intersection in the reverse lane by Vissim.