城市道路交叉口自适应公交信号优先控制研究

StudyonSignal Control for Adaptive Transit Priority at Urban Road Intersection

单点交叉口信号优先可以降低公交车辆延误且易于实现。阐述了自适应公交信号优先的相关理论,定义了公交优先预判断指数R b,使公交信号优先预判断这个复杂的步骤大大简化;着重分析了自适应公交信号优先策略的延误估算,确定了延误估算目标函数。最后通过实例分析,利用VISSIM仿真软件进行了验证,研究表明:自适应优先下的人均延误比固定相位无优先和固定相位优先下的人均延误有明显降低,效率分别提高了8.2%和13.1%,公交车辆延误亦有所降低,自适应公交信号优先与其他2种方式相比更注重系统综合效用,获得了较好的控制效果。

Giving buses priority at an isolated intersection is an efficient and realizable approach to decrease bus delay. This paper has presented the theory related about signal control for adaptive transit priority and defined the index R_bof the prejudgment for transit priority, which making the procedure of the prejudgment for transit prioritysimpliliedimmensely;The main point is analyzing the delay estimation for strategy of adaptive transit priority and determining the delay estimation model;Atlast,It is tested by the traffic simulation softweare VISSIM though an example,the study shows that the man average delay for adaptive transit prioritysignificantly lower than that for passive and active signal priority, and the efficiency is increased respectively by 8.2% and 13.1%,and the vehicle average delay declined as well.Adaptive transit priority pays more attention to the comprehensive utility than other strategies and acquires good control effect.