It consists of 37 stations from Samaypur Badli in Delhi to Millennium City Centre in the neighbouring city of Gurgaon in Haryana.

The 49.02 kilometers (30.46 mi) line is mostly underground and laid under one of the most congested parts of Delhi.

Chawri Bazar metro station is the second deepest station of the Delhi Metro network and is situated about 25 metres (82 ft) below ground level and has 18 escalators.

Prime Minister Manmohan Singh inaugurated this 4 km stretch on 19 December 2004.

The Haryana Mass Rapid Transit Corporation (HMRTC) has plans to establish a metro network spanning 188 kilometers in Gurugram.