TheKolkata MetroorCalcutta Metrois ametrosystem serving the city ofKolkataand the districts ofSouth 24 ParganasandNorth 24 Parganasin the Indian state ofWest Bengal. It is the first underground metro railway system in India. The network consists of one operational line (Line 1) and one under construction (Line 2), with four further lines in various stages of planning. It was the first such form of transport in India, opening for commercial services in 1984. It is the 17th zone of theIndian Railwayssystem.Contents[hide] 1History 2Construction 3Kolkata Metro Master Plan 3.1Further information 3.2Major modifications 4Network 4.1Line 1 (North-South Metro) 4.2Line 2 (East-West Metro) 4.3Line 3 (Joka-B.B.D.Bag Metro) 4.4Line 4 (Noapara-Barasat Metro) 4.5Line 5/1 (Noapara-Dakshineswar Strech) 4.6Line 5 (Baranagar-Barrackpore Metro) 4.7Line 6 (New Garia-Biman Bandar Metro) 5Infrastructure 5.1Rolling Stock 5.2Stations and Electrification 5.3Signalling and Frequency 6Facilities and services 6.1Tokens 6.2Smart Card 6.3Security 6.4Departments 7See also 8References 9External linksKolkata Metro System MapIn 2010, the Railway Ministry announced plans for the construction of five new metro lines and an extension of the existingNorth-Southcorridor. These new projects are: Salt Lake City- Howrah Maidan Joka-BBD Bagh Noapara-BarasatviaNetaji Subhas Chandra Bose International Airport Baranagar-Barrackpore Noapara - Dakshineswar New Garia-Airport Extension ofLine 1fromDum DumtoDakshineshwarviaNoaparaFurther information[edit]Kolkata Metro Railway - Official Site - for extension detailsMajor modifications[edit] Construction of station at Noapara: A new 4-platform station has been constructed at Noapara. Commuters of Line 1 will be able to interchange trains going towards theAirportvia Line 4 (Noapara-Barasat). For the time being only two platforms are in use, but once Line 4 gets started, all four platforms will become operational. Upgrade of "Central" metro station: A subway is going to be constructed in the existingCentralstation to provide an interchange betweenLine 1andLine 2. Commuters will have to pass through the subway to access the new station that will be constructed on the west side of the existing station.Network[edit]LineFirst operationalLast ExtensionStationsLength(km)Terminals

Line 124 October 198410 July 20132428.14NoaparaKavi Subhash

Line 2December 20161214.67Howrah MaidanSalt Lake Sector 5

Line 3December 20161517.075Diamond ParkMahakaran(BBD BAG)

Line 4917.13NoaparaBarasat

Line 51112.40BaranagarBarrackpore

Line 5/1034.11NoaparaDakshineswar

Line 62429.10Kavi SubhashAirport

Total90120.25

Line 1 (North-South Metro)[edit]Main article:Kolkata Metro Line 1

Kolkata metro Railway,the oldest metro inIndiaLine 1 has a total length of 28 kilometres (17mi) serving 24stationsof which 15 are underground. It has a combination of elevated, ground-level and underground lines and uses five and a half feet (1676 milimetres) ofIndian gauge, a broad gaugerolling stock. It was the first underground railway to be built in India, with the first trains running in October 1984, and the full stretch that had been initially planned was completed and operational by February 1995. On 28 December 2010, it became the 17th zone of theIndian Railways.[4]TheNew Delhi Metro, which opened in 2002, is the second such urban metro rail network in India. It had benefitted from the expertise gained during the Kolkata metro construction. In being the countrys first metro and constructed as a completely indigenous process, the Kolkata Metro was more of a trial-and-error affair, in contrast to the Delhi Metro, which has also seen the involvement of numerous international consultants. As a result, it took nearly 23 years to completely construct a 17km underground railway.[1]1. Kavi Subhash(New Garia)2. Shahid Khudiram(Briji)3. Kavi Nazrul(GariaBazar)4. Gitanjali(Naktala)5. Masterda Surya Sen(Bansdroni)6. Netaji(Kudghat)7. Mahanayak Uttam Kumar(Tollygounge)8. Rabindra Sarobar9. Kalighat10. Jatin Das Park11. Netaji Bhavan12. Rabindra sadan13. Maidan14. Park Street15. Esplanade16. Chandni Chowk17. Central18. Mahatma Gandhi Road19. Girish Park20. Shobhabazar Sutanuti21. Shyambazaar22. Belgachhia23. Dum Dum24. Noapara