Urban Traffic Condition Analysis Based on GPS Floating Car Data

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.