分析了交通网络的几何和交通流特征，建立了以车道为基本建模单元的交通网络模型，并探讨了交通网络模型中拓扑关系的表达方法，建立的城市交通网络模型为交通网络的优化提供了基础。%The article analyzes geometric and traffic flow characteristics of traffic network,establishes traffic network model with lane as basic modeling unit,explores topological relation expression methods in traffic network model,and finally establishes urban traffic network model, which has laid a foundation for optimizing traffic network.
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