An additional Blue Line and the expansion of the existing three Metro Lines are planned for the future.
Each of Doha Metro's tunnels is an enormous 6.7m in diameter.
In constructing the Doha Metro Rail System, Qatar tunnelled their way into the Guinness Book of Records.
111 km of tunnels were excavated during the construction of Qatar's new Metro system, taking just under two years to complete.
Capable of reaching 100 km/h, the driverless Metro trains whizzing around Doha are one of the world's fastest.