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The Lower Thames Crossing, or Third Thames Crossing, is a proposed new crossing of the Thames estuary linking the county of Kent with the county of Essex, at or east of the existing Dartford Crossing. ==Description== In January 2009, the Department for Transport proposed three major options to increase capacity east of London over the Thames to be built downstream of the existing Dartford Crossing and an additional proposal to increase capacity at the Dartford Crossing. *Option A: Building an additional road crossing at the current Dartford Crossing and removing the old Dartford crossing tunnels from the strategic road network. :Later government publications state that the old tunnels will remain in use.〔(''Review of Lower Thames Crossing: final review report'' ), Department for Transport, 21 May 2013, accessed 2014-10-29〕 *Option B: A new road crossing in the Swanscombe Peninsula area, connecting the A2 near Dartford (south) to the A1089 road, north of Tilbury Docks. :Transport Secretary Patrick McLoughlin announced in December 2013 that the Government had dropped this option, partly because of its potential disruption to a proposed large scale new theme park and associated development on the Swanscombe Peninsula. *Option C: A new road crossing connecting the M2 motorway and M20 motorways in the south with the M25, which might be linked via a proposed new Thames flood barrier. The route from the north would pass close to South Ockendon, Orsett, Chadwell St Mary, West Tilbury, East Tilbury, across West Tilbury Marshes before it crossed the Thames just to the east of Gravesend and Thurrock. It would join the M2 in the Kent Downs Area of Outstanding Natural Beauty and in the Special Landscape Area. This proposed link is also within the Kent Downs AONB and special landscape area. According to the DfT, this long route would have "considerable environmental impacts". *Also: Increased capacity on the current Dartford Crossing at a lower cost. This option did not accommodate the predicted traffic growth in the longer term. Advocates of the proposal argue that a new crossing is needed to alleviate congestion at the Dartford Crossing. Currently, there is a ferry service operating between Gravesend and Tilbury, which predominantly carries foot passengers and the occasional light motorcycle, subject to space limitations, only Monday to Friday. 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「Lower Thames Crossing」の詳細全文を読む スポンサード リンク
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