【摘要】 公路网合理等级结构的确定,是公路网规划的组成内容之一,也是公路网布局优化的重要组成内容之一.以我国公路网建设和公路交通的实际为背景,首先对现有的公路网等级结构优化目标进行分析,然后从公路规划者和使用者的角度出发,提出了公路网等级结构优化应采用的优化目标,据此对现有的目标规划模型进行了改进,并对改进后的模型进行了示例分析.更多还原

【Abstract】 The determination of the rational highway grade structure is one part of highway network planning,it also is an important content of highway network layout optimization.Using the highway network construction and highway traffic of China as background,this paper firstly analyzed the optimization objective of current highway network grade structure,then the objectives that highway network grade structure optimization should use are put forward from the angle of highway planners and users.Based on the objectives,the current goal programming model is improved and illustrated in this paper.更多还原