The Dhaka Metro Rail, or simply the Dhaka Metro, is a mass rapid transit system serving Dhaka, the capital and largest city of Bangladesh. It is operated by the Dhaka Mass Transit Company Limited (DMTCL). Together with the under construction Dhaka BRT, proposed Dhaka Subway and Dhaka suburban circular rail, it is expected to reduce traffic congestion in the city. The metro rail network has five planned lines which are the MRT Line 6, the only operational line, MRT Line 1 and MRT line 5, which are under construction, and MRT Line 2 and MRT Line 4, which are in the planning stages. It is part of the Strategic Transport Plan outlined by the Dhaka Transport Coordination Authority (DTCA).