Union Minister Hardeep Singh Puri and Delhi Chief Minister Arvind Kejriwal will formally flag off 'Grey Line' on October 4. It will connect Dwarka to Najafgarh.
The new metro line will connect South West Delhi with the rest of the National Capital.
The Dwarka-Najafgarh line will be further extended to Dhasa, the last post of Delhi bordering Haryana, in due course of time. The 4.2-km route will have 2.7-km long elevated stretch.
The corridor consists of three stations - Dwarka (interchange with Blue Line), Nangli and Najafgarh.
Sources said that the flagging off ceremony will take place at Metro Bhawan at 12.15 pm. Passenger services will start at 5 pm.
With the launch of the Grey Line, the total length of metro network will be 377 km in Delhi.
Three trains will ply with a frequency of 7.5 minutes on the route. One more train will be added to the fleet in near future.
The Najafgarh station will be the longest underground station in Delhi at a length of 288 meter.