 Phase IV has a 2021 deadline , and tentatively includes further extensions to Sonia Vihar , <unk> , <unk> , <unk> <unk> , Palam , <unk> , <unk> , Ghazipur , Noida sector 62 , extensions of Violet line , Green line , Line 8 , having a total length of over 100 km . There might be some changes in plan before actual construction starts on these lines . Delhi metro phase 4 got delhi government approval awaiting union cabinet approval . The proposed corridors : Rithala <unk> ( 21 @.@ 73 km ) Inderlok Indraprastha ( 12 @.@ 57 km ) <unk> Terminal 1 ( 22 @.@ 20 km ) Lajpat Nagar Saket G @-@ Block ( 7 @.@ 96 km ) <unk> ( west ) RK Ashram ( 28 @.@ 92 km ) <unk> <unk> ( 12 @.@ 54 km ) Along with that the <unk> government planning a metro corridor between gurgaon and <unk> . As well as gurgaon will soon see a multiple extension of rapid metro and delhi metro . Some of are a metro corridor between <unk> to <unk> chowk line , A new <unk> lines covering old and new gurgaon region like gurgaon railway station and bus stand and various sectors like sector 10 , <unk> chowk , <unk> connecting <unk> expressway metro line etc , yellow line extension from <unk> city centre to <unk> via <unk> chowk ( gurgaon ) interchanging with old gurgaon metro line , connecting with delhi regional rapid rail system ( delhi gurgaon <unk> corridor ) , pod taxi system . Dwarka expressway metro line . As well as plans have been mooted to construct a new line from Noida Sector 62 to Greater Noida which will intersect Indraprastha – Noida Sector 32 line . The Ghaziabad Development Authority is planning to extend Delhi Metro lines deeper into Ghaziabad through extension of the Blue Line from Vaishali to Mehrauli via <unk> . The independently operated Gurgaon Metro , opened in November 2013 , will also interchange with the Delhi Metro at <unk> station on Yellow line . For the year 2012 – 13 , Noida development Authority has allocated Rs 5 billion for Metro extension , with City Centre Metro line being extended till the crossing of Sector 71 and 72 . After phase 4 , delhi metro will focus on phase 5 covering outer region of delhi . And phase 6 , 7 and many more plan according it . 
