One problem with the existing dynamic exclusive bus lane strategies is that bus signal priority strategies with multi-phase priority request at intersections are not adequately considered.The principle of bus signal p...One problem with the existing dynamic exclusive bus lane strategies is that bus signal priority strategies with multi-phase priority request at intersections are not adequately considered.The principle of bus signal priority level was designed based on the isolated multi-phase structure principle consideration of the bus signal priority,and a new priority approach for the dynamic exclusive bus lane was proposed.Two types of priority strategies,green extension and red truncation,were proposed for current phase and next phase buses,respectively.The control parameters including minimum green time,green extension time,maximum green time and bus arrival time are calculated.The case studies for this paper were carried out using four consecutive intersections of Huaide Middle Road in Changzhou City.The signal control scheme was designed using the conventional,exclusive bus lane method,the dynamic exclusive bus lane without signal priority method,and the proposed approach,respectively.The authors used the VISSIM simulation platform to evaluate the efficiency of each approach.Results showed that the method of approach can significantly decrease delays caused by social and conventional buses and make up for the negative impact social buses have on the bus rapid transit(BRT)operation,which allows the method to complement the dynamic,exclusive bus lane design.展开更多
近年来,中国民航持续高速发展,预计“十四五”末期中国民航运输机场数量将达到270个以上,逐步实现运输机场网络化覆盖。然而,由于机场之间空间分布过于密集而形成的机场集群式效应,造成邻近空域之间存在着复杂的耦合作用关系,若不能在...近年来,中国民航持续高速发展,预计“十四五”末期中国民航运输机场数量将达到270个以上,逐步实现运输机场网络化覆盖。然而,由于机场之间空间分布过于密集而形成的机场集群式效应,造成邻近空域之间存在着复杂的耦合作用关系,若不能在空间和时间上对机场群内各资源进行充分解耦,则难以提升整体运行安全和效率。当前运行优化技术主要侧重于各自局部单一资源的优化,并没有统筹考虑内部跨区域的约束条件以及跨业务的运行环境,因此仅能得到局部最优化管制策略。为解决机场群全局集中式运行协同规划的实际需求,对集成进离场与场面运行(integrated arrival and departure and surface operations,IADS)技术展开综述。首先,从进场、离场和场面局部运行优化技术出发,分析中外研究近况并指明现存问题及研究局限;其次,创新性地对集成进离场与场面运行概念与技术总-分结构进行阐述,系统性说明IADS内在成分和逻辑关联;最后,分别从宏-微观尺度详细描述IADS所涉及的联合进场-离场调度排序问题、机场场面运行管理问题、进-离场航线选择问题以及基于时间的过点时序管控问题的算法框架和模型,并对未来研究方向进行展望。为推动中国机场群空地一体化运行、全局精细化管控提供理论基础,为“世界级机场群”及“智慧空管”等建设提供技术支撑。展开更多
基金This research was funded by National Natural Science Foundation of China(NSFC),grant number 51678076Hunan Provincial Key Laboratory of Smart Roadway and Cooperative Vehicle-Infrastructure Systems,grant number 2017TP1016.
文摘One problem with the existing dynamic exclusive bus lane strategies is that bus signal priority strategies with multi-phase priority request at intersections are not adequately considered.The principle of bus signal priority level was designed based on the isolated multi-phase structure principle consideration of the bus signal priority,and a new priority approach for the dynamic exclusive bus lane was proposed.Two types of priority strategies,green extension and red truncation,were proposed for current phase and next phase buses,respectively.The control parameters including minimum green time,green extension time,maximum green time and bus arrival time are calculated.The case studies for this paper were carried out using four consecutive intersections of Huaide Middle Road in Changzhou City.The signal control scheme was designed using the conventional,exclusive bus lane method,the dynamic exclusive bus lane without signal priority method,and the proposed approach,respectively.The authors used the VISSIM simulation platform to evaluate the efficiency of each approach.Results showed that the method of approach can significantly decrease delays caused by social and conventional buses and make up for the negative impact social buses have on the bus rapid transit(BRT)operation,which allows the method to complement the dynamic,exclusive bus lane design.
文摘近年来,中国民航持续高速发展,预计“十四五”末期中国民航运输机场数量将达到270个以上,逐步实现运输机场网络化覆盖。然而,由于机场之间空间分布过于密集而形成的机场集群式效应,造成邻近空域之间存在着复杂的耦合作用关系,若不能在空间和时间上对机场群内各资源进行充分解耦,则难以提升整体运行安全和效率。当前运行优化技术主要侧重于各自局部单一资源的优化,并没有统筹考虑内部跨区域的约束条件以及跨业务的运行环境,因此仅能得到局部最优化管制策略。为解决机场群全局集中式运行协同规划的实际需求,对集成进离场与场面运行(integrated arrival and departure and surface operations,IADS)技术展开综述。首先,从进场、离场和场面局部运行优化技术出发,分析中外研究近况并指明现存问题及研究局限;其次,创新性地对集成进离场与场面运行概念与技术总-分结构进行阐述,系统性说明IADS内在成分和逻辑关联;最后,分别从宏-微观尺度详细描述IADS所涉及的联合进场-离场调度排序问题、机场场面运行管理问题、进-离场航线选择问题以及基于时间的过点时序管控问题的算法框架和模型,并对未来研究方向进行展望。为推动中国机场群空地一体化运行、全局精细化管控提供理论基础,为“世界级机场群”及“智慧空管”等建设提供技术支撑。
