本文建立了公路建设五年规划的系统优化模型。模型从区域公路建设系统的整体角度出发,列出资金、限供材料(钢材、水泥,沥青等)、项目本身性质、项目之间的各种联系等约束,以各项目分别按规划期中各年开工作为决策变量,以直接社会效益最大为目标(净现值作为指标)进行优化,从而确定规划期项目并排定各项目开工年号。编有相应的电算程序,附有算例。 This paper establishes a system optimization model of five-year highway construction plan. From the overall perspective of the regional highway construction system, the model lists the constraints of capital, limited materials (steel, cement, asphalt, etc.), the nature of the project itself, and the various links between the projects. In each project, Starting as a decision variable, the direct social benefits as the goal (net present value as an indicator) to optimize, to determine the planning period of the project and set the project start date. Compiled with the corresponding computer program, with an example.