【摘要】 从保证行车安全、视觉连续、心理舒适的角度分析了 Ｓ型、卵型、凸型等特殊平面线形与纵断面线形的组合设计问题提出了因受地形、地物限制，特殊平面线形与竖曲线重合时的合理组合方案和技术指标，并给出了平、竖曲线不宜组合在一起时应错开的最短距离，为公路的线形设计提供了参考更多还原

【Abstract】 Discusses the designing problems combining the special plane alignment,such as S type,Protrud type,Ovum type ect. With the profile alignment from the angle of pledging safe driving,visual comtiuity and psychological comfort. It is usually not suitable to combine special plane aligmment with profile alignment,but if special plane alignment coincide with profile alligmment because of topograph or surface features limit,the combining desing plans and technological targets are given. If it is impossible to combine plane alignment with profile alignment,this paper also gives the shortest distance between them. The results will be useful for highway alignment designing.更多还原