On Seven Plans of Shuto-Expressway and These Design Consepts

Abstract

There were seven plans of Shuto-Expressway. Yamada's 1938 plan was the firest one and the last 1959 authorized plan. These plans are analysed from following eight viewpoints by means of documents survey. a) purpose of the plan b) design concept and model c) route and network d) geometric design standard e) road formation f) proposed road site g) management subject h) townscape and structure design. As a result, charactaristics of these plans are pointed out and design consept relations are grasped clearly. Three common concepts in these plans are found out. 1) These plans set little importance on townscape of Tokyo except partial road formation and structure design. 2) The model was the expressways of American cities (ex. Chicago, Newyork) in any case. 3) The significance of circular rou to was not realized precisely.