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Gateway WA, formally the Gateway WA Perth Airport and Freight Access Project, is a $1 billion project that will upgrade the road network around Perth Airport. The project is located on portions of the southern parts of Perth Airport land, and adjacent land allocated for transport. It lies mainly within the local government area of the City of Belmont, with the eastern area in the Shire of Kalamunda. It is the largest project Main Roads Western Australia has ever undertaken, covering the upgrade of Tonkin, Leach, and Roe Highways, and the construction of four new interchanges. The project is jointly funded by state and federal governments, which are providing $317.5 million and $686.4 million respectively. As part of the project, Tonkin Highway will be expanded from two to three lanes in both directions, between Great Eastern Highway and Roe Highway, and the existing intersections in this section will be grade separated. A new diamond interchange will be constructed at Boud Avenue, to provide access to the domestic terminal precinct. International terminal access will be provided via a new freeway-to-freeway cloverstack interchange at Leach Highway, and a single-point urban interchange to be constructed at Tonkin Highway's intersection with Horrie Miller Drive and Kewdale Road. The existing diamond interchange with Roe Highway will only be upgraded to a partial freeway-to-freeway interchange, but with plans to further upgrade it to a completely free-flowing interchange in the future.〔 The Gateway WA works are separate to Perth Airport redevelopment works being undertaken at the same time. The new airport access road, Airport Drive, features in both projects: the portion in the vicinity of its interchange with Leach and Tonkin Highways will be constructed as part of Gateway WA,〔(Gateway WA Perth Airport and Freight Access Project map ) (PDF). Gateway WA. Retrieved 27 January 2015.〕 with the remainder – the majority of the road – part of the airport redevelopment.〔(Airport Drive ). Perth Airport. Retrieved 3 Jan 2015.〕 In January 2013, works was undertaken to protect or relocate sections of the Canning Trunk water main and the Dampier to Bunbury Natural Gas Pipeline in the vicinity of the project. Construction on the Gateway WA project officially began on 1 February 2013 with a groundbreaking ceremony attended by the state and federal transport ministers, Troy Buswell and Anthony Albanese. The first section being constructed is an entrance ramp from Abernethy Road to Tonkin Highway southbound. Work on the Leach Highway interchange is expected to commence at the end of 2013, with construction of the other interchanges scheduled to start at the end of 2014. The whole project was due to be completed by 2017,〔 but then moved to mid-2016 due to the project's construction moving faster than predicted.〔 〕 In September 2015, the completion date was moved to March 2016 following the completion of the Tonkin Highway/Leach Highway, Leach Highway/Abernethy Road and Tonkin Highway/Dunreath Drive Interchanges that same month. The project is also estimated to be 50 million dollars under-budget.〔(【引用サイトリンク】title=Gateway WA's Grand Gateway now open to Perth )〕 ==Components== Construction of Gateway WA involves several components, with construction divided into three main zones: northern, western, and southern.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Gateway WA」の詳細全文を読む スポンサード リンク
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