 The Violet Line is the most recent line of the Metro to be opened , and the second standard @-@ gauge corridor after the Green Line . The 37 km ( 23 mi ) long line connects Escorts Mujesar in Faridabad to ITO , with 22 @.@ 8 km ( 14 @.@ 2 mi ) being overhead and the rest underground . The first section between Central Secretariat and Sarita Vihar was inaugurated on 3 October 2010 , just hours before the inaugural ceremony of the 2010 Commonwealth Games , and connects the Jawaharlal Nehru Stadium , which was the venue for the opening and closing ceremonies of the event . Completed in just 41 months , it includes a 100 m ( 330 ft ) long bridge over the Indian Railways mainlines and a 167 @.@ 5 m ( 550 ft ) long cable @-@ stayed bridge across an operational road flyover , and connects several hospitals , tourist attractions , and a major industrial estate along its route . Services are provided at intervals of 5 min . An interchange with the Yellow Line is available at Central Secretariat through an integrated concourse . On 14 January 2011 , the remaining portion from Sarita Vihar to Badarpur was opened for commercial service , adding three new stations to the network and marking the completion of the line . The section between Mandi House and Central Secretariat , was opened on 26 June 2014 . After that a 971 @-@ metre section between ITO and Mandi House was opened on 8 June 2015 . The latest addition to the line , an 14 km ( 8 @.@ 7 mi ) extension southwards till Escorts Mujesar in Faridabad was inaugurated by Prime Minister Narendra Modi on 6 September 2015 . All the nine Metro stations of the Badarpur – Escorts Mujesar ( Faridabad ) section of Delhi Metro 's Phase 3 , have been awarded the highest possible rating ( platinum ) for adherence to green building norms , by the Indian Green Building Council ( IGBC ) , which has devised a rating mechanism for Metro stations and buildings on a scale of platinum , gold , silver etc. for following the green building specifications . The awards for these stations were given to DMRC 's managing director , Dr. Mangu Singh by Dr. P C Jain , Chairperson , IGBC in the presence of DMRC 's directors and senior officials on 10 September 2015 . Currently the Faridabad corridor of Delhi Metro Violet Line is the longest metro corridor outside of Delhi , consisting of 9 stations and the total length of corridor being 14 km . 
