Jalan Raya Trans Global
As with all major public works projects, funding is an issue. Large international projects such as the Bering Strait crossing, Japan–Korea Undersea Tunnel, dan Terowngan Gibraltar require not only great engineering effort, but also tremendous diplomacy to ensure that costs and benefits would be shared equitably. Other modes of transport, by air and sea, are already available. In addition, geological study must be done to ensure that the local plate tectonics would be compatible with the proposed tunnels.