A 8 lane expressway runs between Delhi and Gurgaon and connects to NH8 (Delhi-Jaipur-Mumbai national highway). The Gurgaon-Qutub minar section of Delhi Metro opened to public on 21 June 2010 and the line has been extended up to Central Secretariat which was ultimately merged with the existing Yellow line between Jahangirpuri and Central Secretariat. Also, a privately owned and operated Gurgaon Metro Rail Link has just opened to connect the Delhi Metro's Sikanderpur Station to NH-8, with 6 stations on a 6 km elevated link. It is a joint venture between DLF 7 IL&FS. The IGI Airport is just 15 kilometres from the city centre which is only 15 minutes car drive and the city is well connected to the airport by NH 8.