一、绪论随着高速公路的发展,互通式立体交叉的形式也随之发展起来。从前,欧美诸国曾提出过许多形式,但多是自然发生的、经验的,没有统一的基础理论。本论文抓住匝道基本的数学组合,把互通式立体交叉的形式建立 I. INTRODUCTION With the development of the expressway, the form of inter-connected three-dimensional cross also developed. Once upon a time, many countries in Europe and the United States have proposed many forms, but most of them are naturally occurring, experienced and have no unified basic theory. This dissertation takes the basic math combination of ramp, and establishes the form of intercommunication