 The Delhi Metro is being built in phases. Phase I completed 58 stations and 65.0 km (40.4 mi) of route length, of which 13.0 km (8.1 mi) is underground and 52.1 km (32.4 mi) surface or elevated. The inauguration of the Dwarka – Barakhamba Road corridor of the Blue Line marked the completion of Phase I on October 2006. Phase II of the network comprises 124.6 km (77.4 mi) of route length and 85 stations, and is fully completed, with the first section opened in June 2008 and the last line opened in August 2011. Phase III (140 km, 69 stations) and Phase IV (106 km, 51 stations) are planned to be completed by 2016 and 2020 respectively, with the network spanning 436 km (271 mi) by then.
