单口放行单、双重控制的四路环交时空优化方法

Optimization Method for Timing and Spacing of Single and Dual Signal Control at Four-leg Roundabout Based on Single Release

为了充分利用十字正交环形交叉口时空资源,基于传统的单口放行四路环交单重信号控制方法,研究改进了传统的单重信号控制模型,建立了最佳周期优化模型;基于不同的环道存车区域提出了梯形控制区和完全控制区两种单口放行双重控制模型,并分别进行了空间渠化和相位相序优化研究。通过仿真实验,对比分析了几种单口放行控制模型的适用条件和控制效果,得到改进的单口放行单重控制较传统控制行车延误减小;完全控制区较梯形控制区的双重控制在控制效果上没有明显差别;单口放行双重控制模型优于单重控制模型。最后以福州市浦上大道/闽江大道四路环形交叉口为实例,验证了本文提出的信号控制模型的有效性。

In order to fully use the time-space resources of cross roundabouts,based on the traditional single release single signal control for four-leg roundabouts,this research improves the control models the traditional single signal control models,and established the optimal cycle length models; Based on different storage region of the circulating lane-T-type control region and the whole control region,two types of the single release dual signal control based on was presented,and the space channelization and phase optimization was studied. By simulation experiment,the applicable condition and control effectiveness of single release control model are compared and analyzed,the delay of the improved single release single signal control is lower than the traditional single release single signal control; But there were no significant differences in control effectiveness between T-type control region and the whole control region of dual signal control; The single release dual signal control model was superior to the single release single signal control model. Finally,taking Pushang Road / Minjiang Road Roundabout in Fuzhou as an example,and the result shows the validity of optimization control models.