摘要
以绿灯末尾排队状态为目标,研究了二相位控制单点交叉口的动态信号配时。根据排队形成和消散过程建立了排队模型,分析了信号周期、绿信比和到达率对排队状态的影响。以两相位排队均处在弱欠饱和状态为控制目标,提出了随到达率变化的简便信号配时算法,根据总流量比计算信号周期,根据较大的流量比调节主相位绿信比。仿真结果表明:信号周期缓慢地同向改变两相排队状态,绿信比反向改变两相排队状态,到达率仅改变相应相位的排队状态。当交叉口饱和流率为0.50 pcu·s-1,黄灯和绿灯前损时间为4 s,到达率在0.10～0.26 pcu·s-1之间变化时,两相排队始终都在弱欠饱和状态,说明配时算法是有效的。
The queuing states in the green end were taken as objective, the dynamic signal timing at single-poim intersection under the control of two-phase signal was studied, a queuing model was built according to the queuing and discharging process, and the effects of signal cycle, split and arrival ratio on the queuing states were analysed. A signal timing simple algorithm following the fluctuation of arrival ratio was put forward when two phases were in little under-saturation queuing states, the cycle was calculated according to the total ratio of flow volume, and the split of main phase was adjusted depending on the higher ratio of flow volume. Simulation result indicates that the cycle slowly changes both phases queuing conditions in the same direction, the split changes them in the reverse direction, and the arrival ratio only alters the queuing conditions of corresponding phases. When saturation flow rates are 0.50 pcu· s^-1, the times of yellow and green former losses are 4 s, and the arrival ratio varies from 0.10 to 0.26 pcu · s^-1 , two phases are in little under saturation queuing states, so the algorithm is effective. 1 tab, 4 figs, 11 refs.
出处
《交通运输工程学报》
EI
CSCD
北大核心
2008年第5期100-103,共4页
Journal of Traffic and Transportation Engineering
基金
教育部新世纪优秀人才支持计划项目(NCET-05-0849)
江西省交通科技项目(200533)
关键词
交通信息控制
二相位单点交叉口
排队状态
信号配时算法
到达率
信号周期
绿信比
traffic information control
two-phase single-point intersection
queuing condition
signal timing algorithm
arrival ratio
signal cycle
split
