Dubai Metro, United Arab Emirates

When completed, Dubai Metro will have 70 kilometres (43 mi) of lines, and 47 stations (including nine underground stations). Two lines are under construction, and three more are planned. The Roads and Transport Authority's masterplan includes 320 km of metro lines up to 2020 to cater to the expected 3.3 million population of the city. There are plans for 268 km of light rail tracks to act as a feeder system for the Metro. The fate of this entire network – which would reportedly be divided into Yellow, Orange, Magenta and Black lines – is now dependent on an economic recovery and private investment.
Under construction
Green Line: 20 kilometres (12 mi) line with 22 stations from Festival City, through the city centre, Dubai International Airport Terminal 2 and the Airport Free Zone. Originally slated to be 17 km, the line length was increased by 5 km to 22.5 km, and the opening date has been delayed from March 2010 to August 2011. As of October 2010, tracklaying was complete, and there had been a trial run.