Research on Methods of Bus Rapid Transit Signal Priority Control

• Main Author: 施奕騁
• Other Authors: 劉霈
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/45184966837314699328

碩士 === 逢甲大學 === 運輸科技與管理學系 === 102 === Traffic congestion has already been one of the most important problems waiting to be soved badly. In this circumstance, Bus Rapid Transit (BRT) is considered to be an efficient way to ease traffic problems, improve traffic conditions and enhance transportation efficiency. In Taiwan, multiple cities are planning their BRT networks, and first to realize the operation in Chiayi. Most of the BRTvehicles have special bus lanes on urban roads, but their characteristics of sharing road resources means the BRT vehicles in urban intersections have to compete the right of way with other social traffic flows. In order to guarantee the high service level of BRT as a new type of public transport system, priority control to the BRT vehicles in an intersection is necessary. However, the widely used inductive control methods only pay attention to reduce the delay of BRT vehicles, while ignoring the influence of other social traffic. This paper discuss the signal control methods in a single intersection when a BRT priority is need. It is believed that both social traffic efficiency and BRT priority should be considered. The passive fixed-time control and the active inductive control are modeled to find the disadvantage. Active adaptive control is put forward, in which arrival time prediction model and scheme execution decision model are proposed. In this control mode, arrival time is predicted when the BRT vehicle close to the intersection, so as to adjust the control strategy dynamically. And finally whether the priority control strategy execution should be operated will be determined, according to the social traffic congestion state. The active adaptive control mode is not limited to the BRT priority, but aslo pays more attention to the efficiency of the whole intersction. Three intersections in Taichung city are simulated to study these control methods. The simulation results show that: the stop rate of BRT vehicles at intersections in active adaptive control mode is much lower that that in passive fixed-time control mode, and even better than the active inductive control mode in off-peak hours; the delay and queue length of social traffic at intersection in active adaptive control mode is much lower than that in active inductive control mode, and close to that in passive fixed-time control mode. Therefore, the active adaptive control mode designed in this paper can not only meet the right-of-way of BRT viehicles, also may guarantee the overall traffic efficiency of the intersection. It provide theoretical basis to the development of operable BRT priority control system.