The number of coaches will also rise to 2,158 from 1,468.
At the same time, Phase 3 of the Delhi Metro will also be completed, expanding the metro network frpm 218 km to 348 km.
The expansion works of the Magenta Line (Janakpuri West-Botanical Garden) and Pink Line (Majlis Park-Shiv Vihar) will be completed by March 2018.
Out of 690 new coaches, 504 will be used for the Magenta and Pink Lines. To tackle the ever-increasing rush of the passengers, the existing corridors will also be increased from 227 to 244 — most of them eight-coach ones.
DMRC will also convert six-coach trains into eight-coach ones, rising the number of such coaches from 56 to 65.
The Pink and Magenta Lines, along with the newly opened Violet Line (Kashmere Gate-Escorts Mujesar), for the time being, will have only six-coach trains.
The four-coach trains of the Red Line (Dilshad Garden-Rithala), DMRC’s first operational corridor, willalso be converted into six-coach ones. From 10 six-coach trains, the number will go up to 39 soon.
DMRC will also hire 3,000 more staffers to its existing 9,000 strength.