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对于公交线路来说,公交场站是公交车的“家”,而对于城市的整个公交线网而言,公交场站是沟通的重要节点。通过科学规划,公交场站将各公交线路有序排列组合从而为市民提供高速高效地出行服务。如果说道路是城市的血管,那么公交场站正如城市的穴位。公交场站的缺失或布局不合理将导致公交线网布局困难、内耗高,不利于市民出行,甚至使城市整个交通体系陷入混乱。 相似文献
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泉州是闽东南重要的港口城市,是福建省三大中心城市之一,海峡西岸经济区重要的制造业基地,在福建省的核心地位非常突出,发挥着侨乡工贸中心城市的先导作用。随着泉州城市化进程的加快,其城市人口不断增加、城市规模不断扩大,城区公交服务如何满足人民群众日益增加的出行需求,已经迫在眉睫。泉州中心城区公交客流调查公交线路跟车调查。公交线路跟车调查一般选取周二至周四时间段,同时要注意避开重大的社会活动。 相似文献
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差异化和精细化的公交服务要求城市管理者和公交运营者加深对公交出行变异性的认识。本文将公交惯常出行定义为乘客个体多次在同一时段或空间乘坐公交的行为,随机出行的定义与之相反。利用厦门市30天连续的常规公交数据,使用DBSCAN算法对出行天数在10天以上的高频乘客进行划分,用核心点来表征惯常出行,用非核心点来表征随机出行。结果表明有78.70%的出行在时间上具有稳定性,有72.32%的出行在空间上具有稳定性。研究结论凸显了公交高频乘客也具有随机出行,且随机出行的统计特征和时空分布与惯常出行有较大差异。研究结论可以应用于个体时空模式挖掘、乘客人群划分、定制公交线路制定、公交差异化服务设置等方面。 相似文献
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城市交通拥堵是国际性难题,也是当前中国大中城市尤其是一线城市面临的共同课题。深圳经过多年发展,目前除少数新拓展区外,全市路网格局基本定型,路网规模基本稳定。但是近年来随着城市更新和土地开发强度不断提高,交通出行需求迅猛增长。交通供需矛盾不断激化,交通拥堵范围不断扩大,现有路网的交通承载力已经逼近极限。深圳市第五次党代会提出,到2015年,本市生产总值超过1.5万亿元,接近新加坡的总量水平。这意味着未来5年除原特区外,单位用地GDP产出要提高到现状的5.5倍,也意味着深圳未来的城市发展必须走复合开发、集约高效的道路,只有大运量、快速化、集约型的交通方式,才能适应高强度城市开发产生的交通需求,而集约型、大容量交通方式支撑尚未形成。如何依托轨道交通,整合公交各种方式,实现轨道和常规公交一体化服务,方便市民出行,是深圳面临的紧迫问题。在对城市与交通之间角色如何定位的思考与摸索中,深圳借鉴世界上发达都市的做法,选择公交都市这一模式,以交通引领城市发展的理念定位深圳未来的城市发展。公交都市成为新时期深圳发展的必然选择。 相似文献
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公交出行是老百姓关注的民生问题之一。公交事业是城市公用事业,公交车辆是城市流动的"血脉",城市公交折射出一个城市的综合实力,是城市的"窗口"和文明进步的象征。在生活节奏日益加快、城市化水平不断提高的今天,城市交通拥堵问题已经成为现代城市面临的重大课题。温家宝总理曾指出:"优先发展城市公共交通是符合中国实际的城市发展和交通发展的正确战略思想"。去年又指示:"发展城市交通,应该公交优先,把公交放在城市交通发展的第一位"。显然,公交优先是城市交通发展战略的思想,也是解决萍乡城区交通拥 相似文献
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Pedestrians as compared to vehicular traffic enjoy a high degree freedom of movement even in heavily congested areas. Consequently, there are more alternative links available to pedestrians between a given origin‐destination (O‐D) pair. This paper describes a study done by the University of Calgary to evaluate the factors affecting the choice of route on intra‐CBD trips or trips within the Central Business District (CBD). An origin destination survey conducted in downtown Calgary, Alberta enabled the identification of the most significant factors influencing the choice. These factors were analyzed in relation to the physical characteristics of the location, personal characteristics of the trip maker and the type of the trip. It appears that most people chose the shortest link and factors such as the level of congestion, safety or visual attractions were only secondary. This suggests that the length should be made a major consideration when planning and designing pedestrian links. 相似文献
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This paper estimates the efficiencies and productivity changes of 12 international airports in the Asia-Pacific region based on data from 1998 to 2006. We apply stochastic frontier analysis (SFA) to compute efficiency estimates and use the Malmquist productivity index (MPI) to analyze productivity changes. We use the SFA model with a translog-type production function after testing the statistical hypotheses. According to the results of the SFA hypothesis tests, airports have experienced a technological regression; the deviations from the efficiency frontier are caused more by technical inefficiency than random noise. However, the inefficiency was found to decrease. The MPI reveals a declining trend resulting more from technological change than from efficiency change, with a decrease in inefficiency. Taken together, both the hypothesis tests and the MPI not only provide consistent conclusions, but also suggest that airports should concentrate on technological progress. 相似文献
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天然气自动计量系统有多种组态软件,由于软件的不相通性,造成了计量系统数据采集的通用性差、数据传输与入库的时效性差、数据利用的可靠性低.结合各组态软件的实际情况,从设计上充分利用Oracle大数据处理能力以及Partition(分区表)的特性,实现历史数据的存储,应用WebService与COM+数据访问组件提供多层数据访问架构,采用OPC与DDE工业数据交换协议,实现了各站场计量数据的实时上传,为连续数据采集和实时监控提供了可能,节约了改造成本. 相似文献
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介绍了城市轨道交通工程中杂散电流不同的监测系统的构成,分析了集中式、分散式和智能型等监测系统的配置和功能,以及智能型实时在线监测系统的重要意义,为轨道交通工程杂散电流监测系统的选择与应用提供参考。 相似文献
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明确埋地管道防腐保温层的技术评价标准,对埋地钢质管道的安全运行,延长管道使用寿命具有重要意义。为了对埋地管道防腐保温层做出有效评价,从间接检测与开挖检测2个方面,结合现场检测数据,提出了基于防腐保温层的电流衰减率、绝缘电阻率、质量状况与厚度的分级评价标准及基于4种评价指标的综合评判方法。工程实践表明,该评价标准对防腐保温层是否存在失效能做出有效判断。 相似文献
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《Transportation Research Part A: General》1991,25(6):407-418
The main deficiency of most current modeling approaches to transportation can be identified as neglect of the integration of existing geographical knowledge in regard to the ex ante transport/land use modeling approaches, with its focus on territorial dynamics and theory development. This paper addresses this aspect of the problem by introducing a theoretical and methodological framework for the analysis of the interrelationship between land uses. The analysis attempts to determine to what extent the functional land use in a city can be considered an ordered pattern. The order sought does not rely on purely spatial configurations, but on the correlation of transportation and land use. The first section of this paper focuses on theoretical considerations. It stresses the fact that conventional approaches do not apply in the present context. It then suggests an alternative based on areas of influence and measured in terms of level of attractance of land uses. The second describes a procedure based on this alternative following the remarkable contribution of Hanjoul, Beguin and Thill. An application of this procedure to the analysis of Shanghai is then examined. Finally, an evaluation of the strategies for optimizing the interrelationship between land uses is presented. The paper concludes with a possible research agenda. 相似文献
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Joseph N. Prashker 《Transportation》1979,8(4):329-346
Reliability of travel modes was found to be the most important characteristic of transportation systems in several attitudinal investigations of individual travel behavior. This paper represents the first part of a research effort aimed at gaining a better understanding of the characteristics of reliability of transportation modes in urban travel. In this research, reliability characteristics are identified; their importance relative to each other is assessed, and an insight into possible structure of an objective reliability index is discussed. The research is based on perceived values of reliability, which were identified through a large attitudinal survey conducted in the Chicago metropolitan area. 相似文献