Abstract: According to the characteristics of spatial-distribution of traffic congestion,city road-network traffic congestion is divided into road section congestion and cross congestion.Consulting the division standard of city road and cross service level,city road-network traffic congestion is classified into five grades:congestion,crowd,general crowd,general unimpeded and unimpeded.The indexes to evaluate city road network traffic congestion are selected.Through the Analytic Hierarchy Process,two hierarchy evaluation index systems and corresponding H-Fuzzy comprehensive evaluation model are established.Finally,the H-Fuzzy evaluation method is used to evaluate the traffic states of one typical city road network.The research results provide an effective quantitative analysis to evaluate city traffic congestion.

Key words: traffic engineering, city traffic, traffic congestion, AHP (Analytic Hierarchy Process), fuzzy synthetic evaluation

摘要： 根据城市路网交通拥堵的空间分布特点将路网交通拥堵划分为路段拥堵和交叉口拥堵,参考城市道路和交叉口服务水平的划分标准将路网交通拥堵度划分为堵塞、拥堵、较拥堵、较畅通、畅通5个等级,选取了路网交通拥堵的判定指标,运用层次分析法建立了路网交通拥堵的二级评判指标体系及相应的H-Fuzzy综合模糊评判模型,最后对一典型路网交通拥堵状况进行了判定,研究成果对于评估城市交通网络拥堵提供了一种有效的定量分析方法。

关键词: 交通工程, 城市交通, 交通拥堵, 层次分析法, 模糊综合评判