Abstract:

In order to decrease the average delay time of roundabout, improve intersection-group efficiency, with roundaout being adopted as the research object, the concept of "virtual roundaout signal control" is introduced to separate roundabout traffic flow with a certain amount of time interval. Then, by appling algebraic method two-way green wave coordinate control scheme in the main path is proposed and establishing the intersection- group phase difference model based on coordinated for Bidirectional Green Wave. Finally, the roundaout between Zhujiangyuan Avenue and Jianning East Road in Qujing, Yunnan province is taken as an example. The results show that the number of main path vehicles that through the roundabout is increased from 66.36 to 88.69 pcu per hundred seconds; average parking time in the roundabout reduced by 10.9% falls to 0.57; average delay time also decreases 23.8% compared with the real situation; the establishing intersection- group phase difference model can well improve the delay of each intersection.

Key words: traffic engineering, signal coordinated control, algebraic method, roundabout, delay

摘要：

为降低环形交叉口的平均延误时间，提高交叉口群车辆通行效率，以环形交叉口为研究对象，通过引入“虚拟信号控制环形交叉口”概念，对到达环岛的交通流进行错时分离，其次应用数解法提出主路径车流双向绿波协调控制方案，建立了基于主路径车流双向绿波协调控制的交叉口群相位差模型，最后利用VISSIM 仿真软件对云南省曲靖市珠江源大道与建宁东路环形交叉口进行验证.结果表明：虚拟状态下主路径车辆通过环形交叉口数由66.36 提高至88.69 辆/100 s；车辆在环形交叉口平均停车次数为0.57 次，较实际降低了10.9%；车辆平均延误时间较实际降低了23.8%；建立的交叉口群相位差模型能够较好地改善各个交叉口的延误效益.

关键词: 交通工程, 信号协调控制, 数解法, 环形交叉口, 延误