Abstract
Interchange is not merely a major way of the intersection of main highways but also one of the important structures of freeway.And trumpet interchange is an important pattern of interchange. The design speed of ramps,the linearity indices of ramps and the patterns of loop ramps are the main influencing factors for the land occupation of freeway trumpet interchange.In this article, their influence on the land occupation have been analyzed in the first.Since then, specific studies between the land occupation and the loop-ramp patterns of trumpet interchanges.Finally, some advices were given to the design of interchanges.
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