And the difficulty of solving large nonlinear scheme is eschewed by using orthogonal enumeration method, the burdensome computation workloads are reduced and a reasonable layout scheme of road network can be gotten by this method.

• 为避免传统方法求解大系统优化问题存在的“组合爆炸”问题,采用正交枚举法作为路网优化的工具,使得计算工作量大大减少,并得到了合理的公路网布局优化决策方案。