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The George Massey Tunnel (often referred to as the Massey Tunnel) is a highway traffic tunnel in the Metro Vancouver region of southwestern British Columbia. It is located approximately south of the city centre of Vancouver, British Columbia, and approximately north of the Canada-U.S. border at Blaine, Washington. Construction, costing approximately $25 million, began on the tunnel in March 1957, and it was opened to traffic on May 23, 1959〔(【引用サイトリンク】title=The Persistent Tunnel "Vision" of British Columbia’s George Massey )〕 as the Deas Island Tunnel. Queen Elizabeth II attended the official opening ceremony of the tunnel on July 15, 1959. It carries a four-lane divided highway under the south arm of the Fraser River estuary, joining the City of Richmond to the north with the Corporation of Delta (a municipality) to the south. It is the only road tunnel below sea level in Canada, making its roadway the lowest road surface in Canada. The tunnel forms part of Highway 99. It is named for Nehamiah "George" Massey, a former Member of the Legislative Assembly of British Columbia. He represented Delta between 1956 and 1960, and was a long-time advocate of a permanent crossing to replace an existing ferry that crossed the south arm of the Fraser River. The tunnel was renamed the George Massey Tunnel in 1967, three years after Massey died. It is still sometimes referred to by its previous name, the Deas Island Tunnel.〔 , public consultations are taking place regarding replacement of the tunnel. ==Configuration== The tunnel is a single tube that is subdivided with a concrete wall, each side containing two traffic lanes. The typical traffic flow has two northbound lanes in the east tube and two southbound lanes in the west tube. In 1989 a counterflow system was introduced to meet increasing traffic demand in the tunnel. At peak rush traffic periods, a reversible lane system is used, with a series of swing gates deployed reducing traffic in one direction to a single lane, while increasing the other direction to three lanes. Morning rush has three lanes northbound (inbound to Vancouver) and evening rush has three southbound lanes (outbound from Vancouver). 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「George Massey Tunnel」の詳細全文を読む スポンサード リンク
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