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Old Street station is a central London National Rail and London Underground station located at the junction of Old Street and City Road just north of the City of London. It lies close to the border between the boroughs of Islington and Hackney. The station is in Travelcard Zone 1. The station is on the Bank branch of London Underground's Northern line, between Moorgate and Angel stations. It is also between Moorgate and Essex Road stations on National Rail's Northern City Line, operated by Great Northern. Although a through station on this route, for ticketing purposes it is considered a central London railway terminus.〔 〕 At the surface, the station is situated under the eastern edge of the busy Old Street roundabout, where Old Street crosses City Road. There is no ground-level station building, access being by ramps and stairs to a modern station entrance which is adjacent to a small shopping parade beneath the roundabout. The original ground-level buildings were removed when the roundabout was constructed. The station has toilets, but they are not open late into the evening. On the Northern line between Old Street and Angel stations is the disused tube station City Road. There are no National Rail trains on weekends or after 10pm. Trains at these times run to/from instead of Moorgate. However, Great Northern are planning to introduce a weekend service from 13 December 2015. ==History== The station was originally opened in November 1901 by the first deep-level tube railway, the City & South London Railway, as part of an extension of its line from Moorgate to Angel. The Northern City Line platforms were opened in February 1904 by the Great Northern & City Railway which built its tunnels to a larger diameter capable of accommodating main-line trains in the hope of carrying trains from its northern terminus at the Great Northern Railway's Finsbury Park station to Moorgate. This eventually happened in the 1970s, with the line becoming a BR route, with through services to Hertford and Welwyn Garden City. During the 1920s the station was rebuilt when escalators (1 & 2) replaced the lift shaft in accessing the platform tunnels. Between 1967 and 1969 the station was once again modified; the surface building was replaced with the current sub-surface structure situated in the centre of the roundabout and an additional escalator shaft (3) was added. During the 1990s the effects of corrosion caused by excessive soil acidity〔Rainey, T.P. and Rosenbaum, M.S., 1989. The adverse influence of geology and groundwater on the behaviour of London Underground railway tunnels near Old Street station. Proceedings of the Geologists’ Association, 100, 123–134, ISSN 0016 7878.〕 required a section of the cast iron running tunnel lining in the Northern line, south of Old Street, to be relined with stainless steel tunnel segments.〔Northern Line tunnel reconstruction at Old Street; authors: N. Burgess; J. Fagents; J. Paterson: Proceedings of the ICE - Transport, Volume 153, Issue 1, 1 February 2002, pages 1 –11, ISSN: 0965-092X.〕 In 2014 the station underwent a redevelopment program around the entrance with a number of pop-up retail space provided as part of a drive to increase its revenue.〔https://tfl.gov.uk/info-for/media/press-releases/2014/april/pop-up-shops-arrive-at-old-street-tube-station-to-reflect-the-vibrancy-of-tech-city〕 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「Old Street station」の詳細全文を読む スポンサード リンク
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