针对高峰时期公交专用道利用率较低的问题,提出一种基于信号预控的动态公交专用道策略,提升道路资源时空利用。在保证公交优先基础上对交通流构成比例进行影响分析,确定了APL、IBL和DBL三种常用车道控制模式适用范围;以路段人均时耗最...针对高峰时期公交专用道利用率较低的问题,提出一种基于信号预控的动态公交专用道策略,提升道路资源时空利用。在保证公交优先基础上对交通流构成比例进行影响分析,确定了APL、IBL和DBL三种常用车道控制模式适用范围;以路段人均时耗最小为目标函数,建立动态公交专用道规划模型,确定了各车道模式临界流量值;考虑交叉口信号差异下车道排队消散时长不同,构建基于信号预控下路段清空条件,实现公交专用道提前预控,建立了信号预控下动态公交专用道控制流程。以重庆市某段路为案例,选取全时段普通混合车道(all purpose lane,APL)、间歇式公交专用道(intermittent bus lane,IBL)和完全式公交专用道(dedicated bus lane,DBL)为参照,分别对实验路段和公交专用道进行评价分析。结果表明:本文动态公交专用道策略能够提高公交专用车道资源利用率,有效缓解公交优先和路段整体交通效率之间的矛盾。展开更多
A control strategy of variable speed limits(VSL)was developed to reduce the travel time at freeway recurrent bottleneck areas.The proposed control strategy particularly focused on preventing the capacity drop and incr...A control strategy of variable speed limits(VSL)was developed to reduce the travel time at freeway recurrent bottleneck areas.The proposed control strategy particularly focused on preventing the capacity drop and increasing the discharge flow.A cell transmission model(CTM)was developed to evaluate the effects of the proposed VSL control strategy on the traffic operations.The results show that the total travel time is reduced by 25.5% and the delay is reduced by 56.1%.The average travel speed is increased by 34.3% and the queue length is reduced by 31.0%.The traffic operation is improved by the proposed VSL control strategy.The way to use the proposed VSL control strategy in different types of freeway bottlenecks was also discussed by considering different traffic flow characteristics.It is concluded that the VSL control strategy is effective for merge bottlenecks but is less effective for diverge bottlenecks.展开更多
文摘针对高峰时期公交专用道利用率较低的问题,提出一种基于信号预控的动态公交专用道策略,提升道路资源时空利用。在保证公交优先基础上对交通流构成比例进行影响分析,确定了APL、IBL和DBL三种常用车道控制模式适用范围;以路段人均时耗最小为目标函数,建立动态公交专用道规划模型,确定了各车道模式临界流量值;考虑交叉口信号差异下车道排队消散时长不同,构建基于信号预控下路段清空条件,实现公交专用道提前预控,建立了信号预控下动态公交专用道控制流程。以重庆市某段路为案例,选取全时段普通混合车道(all purpose lane,APL)、间歇式公交专用道(intermittent bus lane,IBL)和完全式公交专用道(dedicated bus lane,DBL)为参照,分别对实验路段和公交专用道进行评价分析。结果表明:本文动态公交专用道策略能够提高公交专用车道资源利用率,有效缓解公交优先和路段整体交通效率之间的矛盾。
基金Project(2012CB725400)supported by the National Key Basic Research Program of ChinaProject(2011AA110303)supported by the National High Technology Research and Development Program of ChinaProject(YBPY1211)supported by the Scientific Research Foundation of the Graduate School of Southeast University,China
文摘A control strategy of variable speed limits(VSL)was developed to reduce the travel time at freeway recurrent bottleneck areas.The proposed control strategy particularly focused on preventing the capacity drop and increasing the discharge flow.A cell transmission model(CTM)was developed to evaluate the effects of the proposed VSL control strategy on the traffic operations.The results show that the total travel time is reduced by 25.5% and the delay is reduced by 56.1%.The average travel speed is increased by 34.3% and the queue length is reduced by 31.0%.The traffic operation is improved by the proposed VSL control strategy.The way to use the proposed VSL control strategy in different types of freeway bottlenecks was also discussed by considering different traffic flow characteristics.It is concluded that the VSL control strategy is effective for merge bottlenecks but is less effective for diverge bottlenecks.