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Control strategies have been widely used in the literature to counteract the effects of bus bunching in passenger‘s waiting times and its variability. These strategies have only been studied for the case of a single bus line in a corridor. However, in many real cases this assumption does not hold. Indeed, there are many transit corridors with multiple bus lines interacting, and this interaction affects the efficiency of the implemented control mechanism.This work develops an optimization model capable of executing a control scheme based on holding strategy for a corridor with multiple bus lines.We analyzed the benefits in the level of service of the public transport system when considering a central operator who wants to maximize the level of service for users of all the bus lines, versus scenarios where each bus line operates independently. A simulation was carried out considering two medium frequency bus lines that serve a set of stops and where these two bus lines coexist in a given subset of stops. In the simulation we compared the existence of a central operator, using the optimization model we developed, against the independent operation of each line.In the simulations the central operator showed a greater reduction in the overall waiting time of the passengers of 55% compared to a no control scenario. It also provided a balanced load of the buses along the corridor, and a lower variability of the bus headways in the subset of stops where the lines coexist, thus obtaining better reliability for all types of passengers present in the public transport system. 相似文献
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Bus rapid transit (BRT) is a popular strategy to increase transit attraction because of its high‐capacity, comfortable service, and fast travel speed with the exclusive right‐of‐way. Various engineering designs of right‐of‐way and the violation enforcement influence interactions between BRT and general traffic flows. An empirical assessment framework is proposed to investigate traffic congestion and lane‐changing patterns at one typical bottleneck along a BRT corridor. The BRT bottleneck consists of bus lane, BRT station, video enforcement zone, and transit signal priority intersection. We analyze oblique cumulative vehicle counts and oblique cumulative lane‐changing maneuvers extracted from videos. The cumulative vehicle counts method widely applied in revealing queueing dynamics at freeway bottlenecks is extended to an urban BRT corridor. In the study site, we assume four lane‐changing patterns, three of which are verified by the empirical measurements. Investigations of interactions between buses and general traffic show that abnormal behaviors (such as lane violations and slow moving of the general traffic) induce 16% reduction in the saturation rate of general traffic and 17% increase in bus travel time. Further observations show that the BRT station and its induced increasing lane‐changing maneuvers increase the downstream queue discharge flows of general traffic. The empirical results also contribute to more efficient strategies of BRT planning and operations, such as alternative enforcement methods, various lane separation types, and optimized traffic operations. Copyright © 2014 John Wiley & Sons, Ltd. 相似文献
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����SVM��Kalman�˲���BRT�г�ʱ��Ԥ��ģ���о� 总被引：1，自引：0，他引：1
本文提出了一个支持向量机进行初始行程时间预测并结合卡尔曼滤波算法进行动态调整的快速公交车行程时间综合预测模型.以快速公交车运行的GPS数据为基础,对北京市朝阳区快速公交2号线进行行程时间预测案例研究.利用该模型对其早高峰和上午平峰的两个不同时段的公交行程时间分别进行预测和对比分析,并通过与单一的卡尔曼滤波方法所得的预测结果进行比较.结果表明,该模型应用于快速公交行程时间预测具有更好的适用性,并且预测平峰时段的精度要高于高峰时段. 相似文献
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现代有轨电车与快速公交BRT的比较及其在我国的应用 总被引：1，自引：0，他引：1
现代有轨电车与快速公交BRT为两种功能上比较接近的公共交通,分别从运能、运行速度、经济性、节能环保和美观等角度系统分析对比两种交通方式,并根据我国不同城市规模、特点,提出其发展有轨电车的应用模式,为今后旨在为后期工程实践提供参考依据. 相似文献
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南奉公路(远东路—浦星公路)位于上海市奉贤区南桥新城,为配套建设上海首条BRT快速公交通道,对南奉公路进行大修并拓宽建设。通过南奉公路(远东路—浦星公路)大修工程的背景及定位解读,从设计理念、总体布置及道路工程方案等层面,对该项目的设计经验进行了总结,为含BRT通道的道路设计及二级公路扩建提供参考。 相似文献
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BRT在大城市公交系统中的功能定位分析 总被引：3，自引：0，他引：3
在阐述快速公交系统(BusRapidTransit,简称BRT)产生、构成的基础上,分析了BRT的功能定位,并从客观的角度提出了BRT现阶段存在的一些问题以及解决问题的对策。 相似文献