关键词: 交通地理信息系统（GIS-T）, 区域交通网络, 网络描述和构建

Abstract: Construction of urban regional traffic network is the base of regional transportation planning，the regional traffic network has a wide range of data，its storage，display，and management process is very complicated.The GIS-T contribute to establish clear，visualized structure of layer for traffic network which has strong maneuverability.The construction method of regional traffic network based on GIS-T is discussed，which based on the regional case of Changsha Yanghuyuan，it realizes the visualization of regional network editing and processing of attribute data by integrating vectorial graph and database，visual inputting，modifying network-data and optimization of project are realized on the basis of TransCAD simulation platform.The information of network can be updated in time，the accurate and complete testdata can be offered for the planning and design of regional transportation network by means of GIS-T.

Key words: Geographic Information System for Transportation（GIS-T）, regional traffic network, network representation and construction