Abstract: In this paper, retrofit of the aligments of worn highways is analyzed. The principles of spline approximation and fitting approximation are applied synthetically, and the objective functions of optimizing models are founded for rebuilding worn highways. To solve the mathematecal programming problems,the numerical means are studied and a Java program is developed to determine the contimuous combined curve parameters meeting the design Specifications

Key words: rebuilding of highways, transitional curves, mathematical programming numerical solution

摘要： 在分析公路旧线改建问题基础上，综合应用样条逼近和拟合逼近原理，建立了旧线路改造优化模型的目标函 数;对于数学规划求解问题，我们研究了其数值解法，并给出Java程序求出符合设计标准的连续组合曲线参数

关键词: 改建公路, 缓和曲线, 数学规划, 数值解法