 The Yellow Line was the second line of the Metro and was the first underground line to be opened . It runs for 49 kilometres ( 30 mi ) from north to south and connects Samaypur Badli with HUDA City Centre in Gurgaon . The northern and southern parts of the line are elevated , while the central section passes through some of the most congested parts of Delhi is underground . The first section between Vishwa Vidyalaya and Kashmere Gate ( built by Kumagai @-@ Skanska @-@ HCC @-@ Itochu Joint Venture ) opened on 20 December 2004 , and the subsequent sections of Kashmere Gate – Central Secretariat opened on 3 July 2005 , and Vishwa Vidyalaya – Jahangirpuri on 4 February 2009 . This line also possesses the country 's deepest Metro station ( the second deepest metro station in the world ) at Chawri Bazaar , situated 30 metres ( 98 ft ) below ground level . On 21 June 2010 , an additional stretch from Qutub Minar to HUDA City Centre was opened , initially operating separately from the main line . However , Chhatarpur station on this line opened on 26 August 2010 . Due to delay in acquiring the land for constructing the station , it was constructed using pre @-@ fabricated structures in a record time of nine months and is the only station in the Delhi metro network to be made completely of steel . The connecting link between Central Secretariat and Qutub Minar opened on 3 September 2010 @.@  re on 10 November 2015 , the line was further extended between Jahangirpuri and Samaypur Badli in Outer Delhi . Interchanges are available with the Red Line and Kashmere Gate ISBT at Kashmere Gate station , Blue Line at Rajiv Chowk Station , Violet Line at Central Secretariat , Airport Express ( Orange ) Line at New Delhi , Rapid MetroRail Gurgaon at Sikandarpur and with the Indian Railways network at Chandni chowk Delhi Junction Railway station and New Delhi New Delhi railway stations . Yellow line is the first line of Delhi Metro which has phased out all four coach trains with six and eight coach configuration . The Metro Museum at Patel Chowk Metro station is a collection of display panels , historical photographs and exhibits , tracing the genesis of the Delhi Metro . The museum was opened on 1 January 2009 . 
