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Ringway 2 was the second innermost of the series of four London Ringways, ring roads planned in the 1960s to circle London at various distances from the city centre. They were part of a comprehensive scheme developed by the Greater London Council (GLC) to alleviate traffic congestion on the city's road system by providing high speed motorway-standard roads within the capital linking a series of radial roads taking traffic into and out of the city. The scheme was cancelled in 1973. Ringway 2 was planned as an upgrade to the North Circular Road (A406) and South Circular Road (A205) which, in the 1960s, were sign-posted routes circling the capital through the suburbs on mostly standard roads selected by route planners in the 1930s. Much of the Ringway, particularly the southern section where a new route was required, would have been placed in cuttings to mitigate disruption to local residents. ==Northern section== The North Circular Road was to have been improved to motorway standard along its existing route with the designated motorway number set to be M15. In the years since the Ringways Plan was cancelled most of the route has been upgraded, some of it close to motorway standard, but this has been done in a piecemeal manner. Whilst most of the route is now a six lane dual carriageway with grade separated junctions other parts remain at a much lower standard. At the western end of the North Circular a new section of motorway would have been constructed to take the route of Ringway 2 eastwards from the junction with the M4 at Gunnersbury along the alignment of the railway line through Chiswick to meet and cross the River Thames at Barnes. The route of the eastern section of the North Circular Road south from the A406's junction with the M11 to the junction with the A13 (the ''"South Woodford to Barking Relief Road"'') was built on the planned motorway alignment and the section between South Woodford and Redbridge roundabout (A12 junction) was, for a time, temporarily designated as part of the M11. At its eastern end, Ringway 2 was planned to have crossed the River Thames at Gallions Reach in a new tunnel between Beckton and Thamesmead. Although this tunnel was never built, the utility of an additional river crossing in this area continued to be recognised during the decades after the Ringway Scheme's cancellation and various proposals for an ''"East London River Crossing"'' have been developed, the most recent of which was the Thames Gateway Bridge, cancelled in 2008. 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「Ringway 2」の詳細全文を読む スポンサード リンク
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