OHASHI JUNCTION 'COMMUNITY, ROAD, RE-DEVELOPMENT INTEGRATED PROJECT'

摘要

Metropolitan Expressway Company Limited, in Tokyo, is constructing the world 2~(nd) longest road tunnel, called the “Yamate Tunnel,” in the centre of the capital, in order to alleviate heavy congestion on the motorway network in Tokyo. The Yamate Tunnel is an essential part of the Metropolitan Central Circular Route (the Central Circular Route) which is one of uncompleted ring roads in Tokyo. The Ohashi Junction connects two routes within the congested urban area: the Yamate Tunnel, a newly opened ring road, and the Metropolitan Expressway Route #3 (Route #3), an existing radial road. There is no other junction in the world that can rival the junction for technological perspectives. The Ohashi Junction is a totally new urban junction, and has provided innovative solutions to city planning, smooth traffic, roadside environment, and other issues in the construction of urban expressway in the Tokyo Metropolitan area. First of all, three dimensional zoning system is used to encourage compact development and effective land use within the redevelopment area. Secondly, the rooftop park and garden as well as the greenery around the junction is expected to reduce the negative environmental impact on the surrounding neighborhood. In addition, the policy on higher safety on disaster-prevention and comfort of driving is adopted since the Ohashi Junction has particular condition. This paper reports various environmentally friendly approaches to realize a sustainable community.