National Authority for Tunnels (NAT) is a Government Agency under the jurisdiction of Ministry of Transport, was incorporated in 1983, for executing Metro Lines and electric traction rail transport projects inside & outside Egypt and does the relevant scientific and economic research in this connection, in cooperation with foreign and local experts NAT is considered the pioneer in the implementation of metro projects in Egypt, the Arab world and Africa through the implementation of the first line, which resulted in the success of its operation and management from the launch to complete the metro network and implement the second and third lines