Freeways and interchange design

Authored by: Keith M. Wolhuter

Geometric Design of Roads Handbook

Print publication date:  April  2015
Online publication date:  October  2015

Print ISBN: 9780415521727
eBook ISBN: 9781482288728
Adobe ISBN:

10.1201/b18344-13

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Abstract

Roads are classified in various ways as described in Chapter 3. To recapitulate, these are

Functional classification, which is the grouping of highways by the character of service they provide across the spectrum of movement ranging from mobility, the highest order of which is the freeway, to direct land access.

Design type classification, which is based on the major geometric features of roads, that is, freeways, conventional highways or streets.

Administrative classification, which is classification by route numbering and, in addition to defining the authority responsible for a particular road, includes application to route guidance for navigation by tourists and others unfamiliar with the layout of the road network. With regard to guidance, reference is made to numbered and unnumbered routes. All freeways are numbered routes.

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