The Central Secretariat to Qutub section will be inaugurated by Union urban development minister Jaipal Reddy and Delhi CM Sheila Dikshit at 1 pm, Delhi Metro Rail Corporation (DMRC) said.
With South Delhi making its way into the metro map, the metro will cut through South Delhi areas such as Jor Bagh, AIIMS, Green Park, Hauz Khas, Saket and Vasant Kunj.
Besides this, the travel time from Gurgaon to Central Delhi would be a little over 45 minutes.
"This is a very important stretch and over one lakh people are expected to use this corridor everyday," DMRC spokesperson Anuj Dayal had said earlier on Wednesdauy, Sep 1.
Apart from the travel benefits for the commuters, South Delhi areas along Chandni Chowk, Chauri Bazaar and Gaffar Market in Karol Bagh are expected to receive a big commercial boost.
The Central Secretariat-Qutab Minar corridor is 12.53 kilometres long and has nine underground stations.
This line was actually scheduled to be operational by mid-August. However, the launch was delayed by the failure to obtain clearance certificates on fire safety and lift and escalators.
The clearance came on Tuesday, Aug 31.
Two other other routes, namely Jehangirpuri to Central Secretariat and Qutub Minar to Huda City Centre, were already opened earlier.