BRT优先控制交叉口的机动车相位固定最小绿灯时间计算方法

Absolute minimum green calculation for vehicle phase at signalized intersections with bus rapid transit signal priority

面向路中型和路边型公交专用路沿线的"十字形"BRT优先控制交叉口,建立了具有2个BRT相位、8个机动车相位和4个行人相位的Ring-Barrier相位结构,引用机动车相位属性的概念,剖析了相位显示顺序的基本规律,认为公交专用路的布设位置对相位结构设计具有重要影响。为了适应相位结构的多样性,以公交专用路的布设位置、机动车相位属性、相位组合方案、相位显示顺序、最小行人过街时间和绿灯间隔时间为依据,建立了一种机动车相位固定最小绿灯时间计算方法。算例表明,该方法具有较好的实用性,可以为BRT优先控制策略研发提供支持。

With regard to four-leg signalized intersections along median or curb-side busway with bus rapid transit signal priority(BRTSP),a ring-barrier phase scheme including two BRT phases,eight vehicle phases and four pedestrian phases is established.Employing the concept of vehicle phase attribute,the principles of potential phase sequences are analyzed.It is found busway location has a great impact on the design of phase scheme.To enable BRTSP to accommodate the variety in the phase scheme,it presents a method to calculate the absolute minimum green time of vehicle phase,depending on busway location,attribute of vehicle phase,phase combination,phase sequence,minimum pedestrian walk interval and intergreen times.The sample results indicate that the method has good practicability and will substantially contribute to the R&D of BRTSP.