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| stock = | linelength_km = 27.39 | tracklength = | notrack = | gauge = Broad gauge | el = 750 V DC using third rail | maximum speed = 55 km/h (in service) | elevation = |map = |map_state = }} The Line 1, also known as North–South Metro of the Kolkata Metro is a rapid transit system serving Kolkata, South 24 Parganas and North 24 Parganas in Indian state of West Bengal. It consists of 23 stations from Kavi Subhash to Dum Dum, of which 6 are elevated, 2 are at grade and the remaining 15 are underground, with a total distance of 25.30 km. The line connects Dum Dum and New Garia and uses Broad gauge rolling stock. Noapara is opened on 10 July 2013. It is elevated and is located 2.09 km. north of Dum Dum. So now (July 2013 onwards), Metro runs a total of 27.39 Kilometers from Noapara to Kavi Subhash where there are total 24 nos. of Stations. It was the first underground railway to be built in India, with the first operations commencing in October, 1984 and the full stretch that was initially planned being operational by February 1995. On 28 December 2010, it became the 17th zone of the Indian Railways. Being the country's first, and a completely indigenous process, the construction of the Kolkata Metro was more of a trial-and-error affair, in contrast to the Delhi Metro, which has seen the involvement of numerous international consultants. As a result, it took nearly 23 years to completely construct around 15 km underground railway from Birpara up to just before of Tollygunj Metro Station. ==History== The laying of the founding stone was done in 1972, but actual construction of line 1 started only in 1978. Line 1 is 17 km. long with 17 stations (see above). Running of the first metro car on the line by 1984 was considered a great engineering challenge.Former railways minister A. B. A. Ghani Khan Chowdhury took a massive effort to perform it. The first section opened between Esplanade & Bhowanipore (now called Netaji Bhawan). First day Metro Railway Kolkata were started by Sri Tapan Kumar Nath and Sri Sanjay Sil. There were no connections of this stretch with the two depots at Dum Dum & Tollygunge (Now called Mahanayak Uttam Kumar). So metro cars had to be put down on the track near Esplanade by crane, by directly digging the road surface. Initially, only four car trains were run until 1986. There were no magnetic gates or escalators at that time and ordinary revolving gates served as exits. The Metro too operated on only a single line. Two years later, line 1 extended up to Tollygunge, at the southern end. At the same time, the metro service was extended to the double line. Magnetic tickets and more entry gates were also introduced at that time. The number of compartments in each train was increased to eight. Metro service was also started from Dum Dum, at the northern end, to Belgachhia in parallel with the extension of the line to the south. But this short portion was not popular and the service was closed down to be restarted when the entire stretch along the north–south corridor was completed. After 1986 many political incidents hampered the construction, and work almost stopped for nearly six years. After restarting work, the Dum Dum to Shyambazar metro service was started in 1994. This portion was served by four car trains. Two months later, the Esplanade – Chandni Chowk section was opened, and Chandni Chowk – Central section opened three months later. The service from Dum Dum to Tollygunge started in 1995, with Mahatma Gandhi Road Station, being opened in 1996. During this time, more magnetic gates and escalators were added and the revolving gates were slowly phased out. 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「Line 1, Kolkata Metro」の詳細全文を読む スポンサード リンク
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