The Dhaka Metro Rail is an approved metro rail system under construction in Dhaka, the capital and largest city of Bangladesh. Together with a separate BRT (Bus Rapid Transit) system it has been long called for to solve the extreme amount of traffic jams and congestion that occur throughout the entire city on a daily basis, among the heaviest in the world. It is a part of the 20-year long Strategic Transport Plan (STP) chalked out by the Government's Dhaka Transport Coordination Authority (DTCA).
Currently the metro rail system consists of one line referred to as the MRT (Mass Rapid Transit) Line-6, with other metro rail lines being added in the future. This Wikipedia article focuses mainly on Dhaka MRT Line-6.
The Dhaka Metro Rail Line-6 consists of 16 elevated stations each of 180m long and 20.1 km of electricity powered light rail tracks. MRT Line-6. All of Line-6, save for the depot, as well as some of its accompanying BRT, will be elevated above current roads primarily above road medians to allow traffic flow underneath, with stations elevated as well.