Dubai metro is the longest driverless, fully automated metro network in the world. There will be two lines - green and red. The Red Line is already partly operational. Its system length is 32.4 mi (52.1 km). The first section of the Red Line, covering 10 stations, was ceremonially inaugurated at 9 : 09 : 09 PM on September 9, 2009, by Mohammed bin Rashid Al Maktoum, Ruler of Dubai. More than 110,000 people, which is nearly 10 per cent of Dubai’s population, used the Metro in its first two days of operation. The train's top speed is 68 mph (110 kmh). The construction cost of Dubai Metro is $7.8 billion.