Abstract: As all important part of the highway，the interchange is an important facility for the transformation of the traffic on the highway．The alignment design of the motmtainous interchange is investigated based on the interchan ge~site selection， pattem selection，the Bout of the alignment and so on．

Key words: mountainous highway, interchange, alignment design

摘要： 互通立交作为高速公路的重要组成部分，是道路上的车辆实现交通转换的重要设施．就从互通立交的位置选 择，型式选择和几何线形的布设等方面对山区互通立交几何线形设计作一探讨．

关键词: 山区高速公路, 互通立交, 几何线形设计