Floating cars equipped with GPS terminal distribute in road network as mobile detectors that can be used as an effective means of detecting the traffic conditions of road network, and taxi shall be an excellent detector for road network condition for its wide traffic coverage and broad time coverage. This paper carries on a quantitative analysis and evaluation on the condition of road network in the main urban area of Changsha city from three layers of "point-line-area", that is based on the data of urban geographical information of Changsha and the GPS data from about 6000 taxies in urban as the source of data, and taking SQL Server 2005 as the data management platform, and using Trans CAD for the secondary development. This research result shows that it can provide a quantitative reference for making traffic management plan and the evaluation of performance on the traffic control facility from intuitive and quick judgment on the urban traffic condition by floating car GPS data.
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机译:装备有GPS终端的浮动汽车作为移动检测器分布在路网中,可以用作检测路网交通状况的有效手段,而出租车应具有良好的交通覆盖范围和时间覆盖范围,是路网状况的绝佳检测器。本文基于长沙市区地理信息和GPS数据,从“点线区”三层对长沙市主城区道路网络状况进行定量分析和评价。以市区约6000辆出租车为数据源,以SQL Server 2005为数据管理平台,并使用Trans CAD进行二次开发。研究结果表明,通过浮动车载GPS数据对城市交通状况的直观,快速判断,可为制定交通管理计划和交通控制设施的性能评价提供定量参考。
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