The Ahmed Hamdi Tunnel is an automobile tunnel under the Suez Canal. It has two lanes of traffic, one in each direction, and connects the Asian Sinai Peninsula to the town of Suez on the African mainland. It was originally constructed as a shield tunnel by the British government in 1983. Shortly after the tunnel was completed, leaks were discovered. In 1992, the Japanese government granted aid to a project aimed at rehabilitating the tunnel. It is 1.63 km long and has an outside diameter of 11.6 m.