高速公路上的互通式立体交叉在设计时需要进行多方案的比选和论证。在常见的方案比选中,对互通立交形式与交通量需求的适应性一般只做定性分析。提出路径比较法的概念,并通过实例进行介绍,认为对上述适应性可通过效率里程的分析计算,提供量化评价指标。最后说明了采用该方法时的要点。 On the highway interchange three-dimensional cross in the design of the need for multi-program comparison and demonstration. In the common scenario comparison, only the qualitative analysis of the adaptability of the form of interchange and the demand of traffic volume is generally made. The concept of path comparison method is proposed and introduced through examples. It is considered that the above adaptability can be provided through quantitative analysis of efficiency mileage. Finally, the key points when using this method are described.