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The Xochimilco Light Rail (locally known as el Tren Ligero) is a light rail line that serves the southern part of Mexico City. It connects to, but is not considered a part of, the Mexico City Metro. Rather, it is operated by the ''Servicio de Transportes Eléctricos'' (STE), the authority that operates Mexico City's electric trolleybus system and formerly operated the municipal electric tram system. ==History== Many of Mexico City's original tram lines were abandoned in the 1960s and 1970s. The original Xochimilco tramline had been in operation since 1910, but the Xochimilco tramway's section between Avenida Tasqueña and the city centre was replaced by a new metro line in 1970.〔Morrison, Allen (2003). (The Tramways of Mexico City, Part 4. ) Retrieved 2010-05-05.〕〔May, Jack (1994). "Mexico Says Sí to LRT: Light Rail South of the Border". ''1994 Light Rail Annual & User's Guide'', pp. 2–5. Pasadena, CA (US): Pentrex. ISSN 0160-6913.〕 With the subsequent Mexico City tramway closures that took effect in May 1979, the only tramlines left in operation were routes 53 and 54, running from Tasqueña metro station to Tlalpan and Xochimilco, respectively.〔''Modern Tramway'', October 1979 issue, p. 364. Ian Allan Publishing.〕 These shared a common routing between Tasqueña and Huipulco, with the Tlalpan service branching off of the main line for only about to its terminus at Avenida San Fernando, in the historic centre of Tlalpan borough. On the common section, the tracks were located in the wide median of Calzada de Tlalpan. The tracks between Huipulco and Xochimilco were also in a separate right-of-way. The separation from street traffic, except at crossings, made routes 53 and 54 more like what later came to be called light rail unlike Mexico City's other tramlines which were closed by 1979, but these lines still lacked other light-rail attributes such a full stations. Thus the decision was made in the early 1980s to convert these lines to modern light rail transit. In 1947 a single PCC was delived to Mexico City from St. Louis Car Company and later second-hand cars:〔http://www.tramz.com/mx/mc/mc75.html〕 * 116 in 1947-1948 from the US and tramways in Aviación and Dolores * 91 in 1954 from Minneapolis * 183 in 1955 from Detroit Both lines ceased operation in September 1984, for rebuilding as light rail. Changes to allow faster operation included replacing the simple tram stops with semi-enclosed ''estaciones'' (stations), which were spaced farther apart, fitted with high-level boarding platforms and set up as paid areas, so that all payment of fares would take place before boarding. In between the stations the work included installing new tracks set in concrete; putting fencing along the line's right-of-way and closing some street crossings; and installing overhead catenary designed for higher speeds.〔〔Saitta, Joseph P. (1987). "Down Mexico Way". ''Traction Yearbook '87'', pp. 119–123. .〕 The fleet of 1940s PCC streetcars was also replaced by a fleet of new articulated light rail cars built partially using components from the old cars, including their PCC bogies (trucks) and propulsion systems (see Rolling stock, below, for more details).〔〔"LRT Developments in Mexico". ''Mass Transit'' magazine, June 1989, pp. 20–21. Cygnus Publishing. ISSN 0364-3484.〕 The section between Tasqueña and Estadio Azteca (Aztec Stadium), just short of Huipulco junction (for the branch to Tlalpan), opened as light rail on 1 August 1986, but ran for only three days before poor reliability with the heavily rebuilt rail cars led to a decision to suspend service.〔〔 Service resumed in November 1986.〔 Right-of-way work then shifted to the line's outer section, between Estadio Azteca and Xochimilco, with similar upgrading for higher-speed operation. This section opened on 29 November 1988.〔 The old tram line 54 had included a long loop through the historic centre of Xochimilco, along narrow city streets, but this was not included in the upgrading to light rail, and was permanently abandoned when closed in 1984.〔 The branch from Huipulco junction to Tlalpan was also rebuilt, but in a different manner, changed from private right-of-way to street running (without separation from other traffic) in the middle lanes of Calle Ferrocarril (now known as Renato Leduc) and also shortened by about at its outer end, no longer reaching Avenida San Fernando. Three high-platform stops were built, one being at the new terminus, which was referred to simply as "Tlalpan" on the rail cars' destination signs. Service to Tlalpan was reintroduced on 13 March 1990, now running only as a one-car shuttle to and from Estadio Azteca, no longer through to Tasqueña.〔''Modern Tramway'', July 1990 issue, p. 244. Ian Allan Publishing.〕 Patronage was low, and service was discontinued only one year later, in March 1991, after an accident damaged the one car (No. 000) normally assigned to the Tlalpan route.〔 Service was reinstated on 13 December 1991, as STE began to place new cars into service on the Xochimilco line, but ceased again on 6 October 1992〔 and has never resumed. The overhead line voltage was 600 volts DC until around the end of 1995, when it was raised to 750 V.〔Webb, Mary; and Pattison, Tony (Eds.) (2003). ''Jane's Urban Transport Systems 2003-2004'', p. 244. Coulsdon, Surrey (UK): Jane's Information Group. ISBN 0-7106-2565-0.〕 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「Xochimilco Light Rail」の詳細全文を読む スポンサード リンク
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