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《运输规划与技术》2012,35(8):868-880
ABSTRACTAnalysis of elevator traffic in high rise buildings is critical to the performance evaluation of elevator group control systems (EGCS). Elevator dispatching methods or parking algorithms in an EGCS can be designed or modified according to analyses of traffic flow. However, interpretation of traffic flow based solely on numerical data may not be explicit and transparent for EGCS experts as well as for other non-expert building administration. In this study, we present a model for visualization and analysis of elevator traffic. First, we present an alternative approach for traffic analysis which we call route visualization. In the proposed approach, we initially decompose elevator traffic into its component parts and investigate each component independently. Then, using superposition of components we obtain a reconstructed model of overall traffic. This modeling approach provides component-based traffic analysis and representation of routes with intensities through data visualization. In the second part we introduce a multi-dimensional analysis of time parameters in ECGS. This approach provides a comparative analysis of several control algorithms such as dispatch or park algorithms for different combinations of traffic components. 相似文献
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潼西高速公路改扩建工程交通组织方案 总被引:2,自引:0,他引:2
文章结合潼西高速公路工程实际情况,对高速公路改扩建工程交通组织的研究思路、内容及设计方案进行介绍,探讨了公路施工过程中出现交通事故或阻塞严重时可采取的应急预案,为后期的公路改扩建施工方案设计提供参考。 相似文献
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An optimal control problem of traffic light duration is considered. The traffic noise level is introduced as a state variable in a dynamical optimization problem. A closed loop control system is designed which influences the green duration of the lights according to the equivalent noise level. Real time considerations lead to sub-optimal control implementation. This control policy decreases the noise levels at intensive traffic intersections. The traffic lights adapt their duration according to the noise pollution. Simulation and experimental results are discussed. 相似文献
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This article presents the economic rationale for road pricing and provides some scale on the magnitude of peak period tolls that might be justified. It discusses the impacts of such tolls on congestion, air quality and economic development and suggests a long term strategy towards areawide implementation of peak period pricing. It discusses current trends which are increasing the likelihood for implementation of congestion pricing and toll roads in the future. In particular, it discusses some aspects of the 1991 Intermodal Surface Transportation Efficiency Act (ISTEA) which will eliminate some of the current restraints on congestion pricing and toll highways.Abbreviations ETC
Electronic toll collection
- FHWA
Federal Highway Administration
- HOV
High occupancy vehicle
- ISTEA
Intermodal Surface Transportation Efficiency Act
- LOS
Level of service
- TCM
Transportation control measure
- V/C
Volume-to-capacity ratio
- VMT
Vehicle mile(s) of travel
- vphpl
Vehicles per hour per lane 相似文献
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体育场馆作为城市公共场所,经常聚集着大量的人群,一旦发生突发性的公共安全事件,就可能带来巨大的经济损失,严重的甚至会导致人员伤亡,给社会带来极大的负面影响。目前,国家越来越重视体育事业的发展,并积极投入大量的人力、物力来修建体育场馆。因此,对体育场馆的安全问题进行研究势在必行。人群拥堵和交通疏散问题是体育场馆安全设计必须考虑的对象,本文对大型体育场馆交通疏散的薄弱环节进行了全面的分析,并提出了有针对性的解决方案与策略。 相似文献
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This paper reports upon a survey of traffic noise annoyance in three residential districts of Trinidad, West Indies. Householder perceptions were solicited by means of a questionnaire survey and direct measurements of traffic noise levels were taken. The results were compared with surveys elsewhere. It was concluded that household status had little effect on annoyance perception, that at L10 levels greater than 70 dB(A) at a dwelling facade the noise level is unacceptable. L10 levels less than 65 dB(A) at the building facade are not perceived as annoying in the environment considered. 相似文献
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为优化城市道路交通信号控制方法,本文结合交通信号控制系统建设发展现状,分析当前各大城市交通信号控制系统普遍存在的问题,立足于互联网环境下的浮动车数据,提出基于互联网平台大数据的交通信号控制辅助优化机制。研究发现可利用互联网路口拥堵报警数据及时有效发现问题路口,利用路段拥堵指数及路口交通流参数变化趋势辅助评估配时方案的优化效果,并通过成都市应用实例证明该机制适用于当前交通控制场景需求,可有效辅助交通信号优化工作,是传统交通模式向真正智能交通模式过渡的阶梯。 相似文献
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文章结合目前高速公路新建立交工程的实施情况,指出交叉工程进行交通管制的必要性和重要性,分析交叉工程交通管制的重点和难点,提出相应的交通管制措施和方法。 相似文献
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文章结合目前广西交通规费征稽工作现状,分析了2006年征稽工作的新形势,提出今年规费征收工作应重点在“保费源、查漏征、治外挂”三个方面下功夫,堵住各种偷、逃、漏规费的渠道,力争2006年广西交通规费征收实现新突破。 相似文献
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The paper presents a comprehensive validation procedure for the passenger traffic model for Copenhagen based on external data
from the Danish national travel survey and traffic counts. The model was validated for the years 2000–2004, with 2004 being
of particular interest because the Copenhagen Metro became operational in autumn 2002. We observed that forecasts from the
demand sub-models agree well with the data from the 2000 national travel survey, with the mode choice forecasts in particular
being a good match with the observed modal split. The results of the 2000 car assignment model matched the observed traffic
better than those of the transit assignment model. With respect to the metro forecasts, the model over-predicts metro passenger
flows by 10–50%. The wide range of findings from the project resulted in two actions. First, a project was started in January
2005 to upgrade the model’s base trip matrices. Second, a dialog between researchers and the Ministry of Transport has been
initiated to discuss the need to upgrade the Copenhagen model, e.g. a switching to an activity-based paradigm and improving
assignment procedures. 相似文献
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随着经济的快速发展,高速公路通车里程得到快速增长,道路客、货运量及周转量不断高速发展,但高速公路的交通安全问题已经成为一个重要的研究课题。本文首先分析了浙江省高速公路交通事故的特点,然后运用轨迹交叉论进行交通事故的原因分析,识别浙江省高速公路危险源,最后有针对性地提出了浙江省高速公路交通事故防治措施。 相似文献
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广州至湛江客运专线(下称广湛客专),位于广东省西南部,东起广州铁路枢纽,向西经过佛山、肇庆、云浮、阳江、茂名,最终到达湛江铁路枢纽,全长392.4km,是广东省东西向高速铁路重要的新通道。客运量预测是项目设计的重要组成部分,根据广湛通道的客流特点,并结合广湛客专在路网中的定位进行客运量预测,有利于编制客车开行方案和线路经济效益的测算,为项目建设提供参考。 相似文献
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交通安全,涉及到人、车以及道路和环境等很多因素。近年来,因为各种原因使得有关单位以及人员将更多的将精力放在人、车、道路这几个因素上,对道路交通环境没有过多的考虑和研究。深入研究道路交通环境,有利于道路交通的安全,文章通过对其的研究和分析,得出有关道路交通环境对交通安全的影响和解决措施,对于防止道路交通安全事故具有重要意义。同时为人们的生命财产的安全提供保障、对构建社会主义和谐社会具有很大帮助。 相似文献
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文章对当前地方国有企业管理中存在的问题进行了分析,并就建立现代企业制度、推进人力资源开发与管理及加强企业党组织发挥保证监督作用进行了思考,提出了一些探索性的意见和建议。 相似文献