Shanghai road net structure form and its existing problems have been introduced in the paper.
分析了上海市快速路网结构产生交通拥堵的原因。
The optimum route planning is one of the best necessary functions for an applied vehicle navigation system which is based on the establishment of the topological structure of the road net.
对于一个实用的车载导航系统，最优路径规划是其必备的十分重要的功能，而道路网络拓扑结构的构建又是最优路径规划的基础。
It includes urban road traffic net structure model, traffic flow generation model, vehicle run behavior model, and urban road traffic net analysis model.
该体系结构由城市道路交通网络结构模型、交通生成模型、车辆行驶行为模型、城市道路交通网络分析模型四类模型组成。
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