中文摘要：

为进一步分析复杂公路网中线路的重要程度，采用对偶拓扑方法，将公路路段按照路名抽象为节点，将交叉口抽象为网络边，对实际公路网进行拓扑结构转换；通过构建网络可靠性指标，应用复杂网络节点度、接近中心性、中介中心性以及连通可靠性指标评价区域公路网结构特征，并给出基于模糊聚类的公路网等级划分方法。分析结果表明：基于对偶拓扑方法，应用复杂网络理论进行公路网结构特征研究，可从连通性、中心性、中间性和可靠性等多个角度反映线路在公路网中的重要程度。

英文摘要：

In order to further analyze route importance of complex highway network, using dual topology method, highway section was abstracted into node according to its name and road intersection was abstracted into edge which were used to convert real highway network to topology structure. Based on this transportation network structure topology method, authors constructed network reliability index and applied evaluation indexes of complex network, such as degree, closeness, betweenness, and connectivity reliability to analysis of regional highway network structure characteristics. Then, grade structure classification method of highway network was put forward based on fuzzy clustering. Analysis result shows that the complex network theory based on dual topology can reflect route importance from the point of view of connectivity, centrality, intermediate and reliability.