出典:Wikipedia
出典:『Wikipedia』 (2011/08/05 01:51 UTC 版)
The London Underground (also known as the Tube or The Underground) is a rapid transit system serving a large part of Greater London and some parts of Buckinghamshire, Essex and Hertfordshire in England. It is the oldest underground railway in the world, the first section of which opened in 1863 on what are now the Circle, Hammersmith & City and Metropolitan lines. In 1890 it became the first to operate electric trains. The whole network is commonly referred to by Londoners and in official publicity as the Tube, although that term originally applied only to the deep-level bored lines, along which run trains of a smaller and more circular cross-section, to distinguish them from the sub-surface "cut and cover" lines that were built first.