快速公交车辆平面交叉口信号优先实现方法

提出以等待延误大小为约束条件在设置快速公交（BRT）专用进口道的十字平面交叉口给予BRT车辆有条件信号优先．有条件优先含义是只给予满足特定条件的BRT车辆信号优先．具体做法是利用检测系统检测BRT辆抵达交叉口遇红灯开始排队待行时刻，依据所有待行BRT车辆的最大等待延误判断是否应提供信号优先服务．信号优先实现方法包括实时调整优先相位、优先相位分隔多次出现和压缩非优先相位．与定时信号控制相比，感应控制根据BRT车辆等待延误大小进行信号调整，提高BRT系统服务质量．

Signal Priority Operation for Bus Rapid Transit Vehicle at the Intersection

The paper outlines an intelligent concept for providing conditional priority to bus rapid transit(BRT) vehicles at a signalized cross-intersection with BRT exclusive approaches according to their delays.Conditional priority means those BRT vehicles that match some specified conditions enjoy a priority to go first.The concept adopts a detection system to detect when BRT vehicles arrive and waits at the approaches because of red signal,and determines whether BRT vehicles need priority on the basis of their maximal delays.Priority is provided by optimizations of signal timing,which includes real time adjusting priority phase time,dividing priority phase and reducing non-priority phase time.Compared with fixed-time control,actuated signals in response to BRT vehicles' delays are more satisfactory as far as BRT quality of service is concerned.