交通 照片 / 影片 (204) 港鐵 東涌綫 @ 欣澳站 Sunny Bay Station mtr Tung Chung line
8東涌綫（英語：Tung Chung Line）是香港港鐵營運的一條連接離島區大嶼山東涌站與香港島中西區中環的香港站的通勤鐵路線，是機場鐵路的一部份。東涌綫於1998年6月22日全綫通車，通車時只有6個站，後來南昌站和欣澳站分別在2003年12月16日和2005年6月1日啟用。
機場鐵路
機場鐵路工程是香港機場核心計劃之一，為香港國際機場及後勤區（即北大嶼山新市鎮）興建連接九龍西及香港島的快速鐵路。工程共建造成兩條路綫，即機場快綫及東涌綫。部分路段（西區海底隧道、青衣至欣澳段及欣澳至小蠔灣車廠段）由兩條綫共用兩條來回方向的路軌，其他路段則共有四條路軌。
本來機場鐵路全線為四軌設計，但由於當時中華人民共和國政府對機場核心計劃的造價與英國政府出現嚴重分歧。後來當英方作出多項讓步後，當中包括將機場鐵路的西隧、青嶼幹線和北大嶼山路段更改為雙線設計（奧運至荔景段則於通車初期為雙線，但預留四線設計，並於南昌站通車同時加建另外兩條行車線），才能達成協議。
東涌綫
東涌綫列車正駛經青荔橋
東涌綫由東涌站開始，經過北大嶼山、青嶼幹線，再經青衣島和青荔橋、西九龍填海區和香港第三條過海鐵路，最後以位於中環填海區的香港站為終點站，於1998年6月22日全綫通車，是首條進入大嶼山的鐵路。總站設於東涌新市鎮，故命名為「東涌綫」。東涌綫亦減輕荃灣綫在1994至96年間飽和狀態和達到分流作用。截至2010年，東涌綫共有8個車站，當中有6個為轉車站。除香港站、九龍站及東涌站為地底車站外，其他車站均為架空或地面車站。不同於其他前地下鐵路公司（於2007年與九廣鐵路合併為港鐵）路綫，東涌綫多數路段均為架空及地面路段。
東涌綫在路綫圖中以橙色代表。東涌綫的車站位置大部分位於新發展區住宅區，所以東涌綫在通車初期時乘客量偏低，隨着國際金融中心、漾日居、擎天半島、奧海城、青衣城及東堤灣畔等沿綫物業相繼於1999年之後啟用及車站沿綫地區發展成熟和本綫對葵涌及荃灣市區需求量不斷增加，加上以接駁當時九廣西鐵的南昌站、香港迪士尼樂園及昂坪360相繼啟用以及來往愉景灣的愉景灣隧道建成後導致乘客量急速增長，因此地鐵公司於2005年向南韓Rotem株式會社為東涌綫訂購4輛新列車。
展望香港迪士尼樂園度假區的樂園擴建及酒店增建、南昌站上蓋物業（匯璽）發展、廣深港高速鐵路西九龍站及西九文化區的興建、葵涌及荃灣商貿區及愉景灣不斷發展，東涌綫的乘客量將不斷增加。東涌綫於周一至周五的上、下午繁忙時間及周六的上午繁忙時間，加開短程班次往來青衣站至香港站（4至5分鐘一班）。
現時東涌綫的班次約為每4-12分鐘一班，設計最終班次為2.25分鐘一班（香港至青衣段）或4.5分鐘一班（全線）。根據港鐵公司所指，機場鐵路兩條行車線的行車方案如下：
The Tung Chung line is one of the eleven lines of the MTR system in Hong Kong, linking Tung Chung with Hong Kong Island. A part of the Tung Chung line was built along with the Kap Shui Mun Bridge and the Tsing Ma Bridge. The line currently travels through eight stations in 27 minutes along its route. The line is indicated by the colour orange.
n October 1989, the Hong Kong government decided to replace the overcrowded Kai Tak International Airport, located in Kowloon, with a new airport to be constructed at Chek Lap Kok. The government also invited the MTR, then called the MTRC, to build a train line to the airport called the Lantau Airport Railway. The project did not begin until the Chinese government and the British government settled financial and land disagreements in November 1994.
The Lantau Airport Railway became two MTR lines, the Tung Chung line and the Airport Express, both lines being served by A-Stock trains with dedicated interior fittings and liveries. On 21 June 1998, the Tung Chung line was officially opened by Hong Kong Chief Executive Tung Chee-hwa, and service commenced the next day.
On 16 December 2003, an open house for charity took place at the recently completed Nam Cheong station, an interchange station between the Tung Chung line and the West Rail line (then the KCR West Rail). The station closed on 19 December 2003 in preparation for the opening of West Rail, and it was officially opened to the public on 20 December 2003. At the same time, the number of cars per train increased from seven to eight.
On 1 June 2005, Sunny Bay station, an interchange station for the Disneyland Resort line, opened two months prior to the opening of the Disneyland Resort line on 1 August that year.
Between 2006 and 2007, four new Korean-built K-Stock trains were added to the Tung Chung line to improve service frequency. The first train was received on 9 February 2006 and entered service on 12 June 2006. However, since the new trains were found to be a few millimetres wider than the existing trains, some modifications were made to station platforms.