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| end_b = | est = 17 December 1997 | maintained = Department of Planning, Transport and Infrastructure | through = , | route = | exits = }} The Southern Expressway is a freeway in South Australia. It was previously the world's longest reversible one way freeway, although it has since been turned into a regular 2-direction freeway. Originally proposed as 'Noarlunga Freeway', it was built as a corridor to relieve heavy traffic from the major arterial, Main South Road, in Adelaide's south. The expressway was built in two stages — the first completed in late 1997, the second in 2001. The total cost of the arterial was A$76.5m, and it is in total length. Main South Road provides both the start and finish. There are exits at Marion Road, Panalatinga Road, Sherriffs Road and Beach Road. The Southern Expressway is signed as M2. Construction of the expressway also included the Adelaide Southern Veloway for cyclists, which runs alongside it for 7 km, from Marion/Main South Road to the Panalatinga Tunnel. South of the Panalatinga Tunnel, the bikeway becomes a shared track for the remaining 12 km of the expressway. The expressway crosses over the Coast to Vines rail trail at both Panalatinga Road and at the expressway's Southern end. The expressway opened to two-way traffic in 2014 after a construction period of about a whole year and a cost of about A$400m.〔http://dpti.sa.gov.au/southern_expressway_duplication〕 ==History== 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「Southern Expressway (South Australia)」の詳細全文を読む スポンサード リンク
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