The Trans Global Highway is a proposed highway system which would link the continents of Earth, with the exception of Australia and Antarctica, through a network of new and existing bridges and tunnels. It was proposed by Frank X. Didik. This would include the connection of North America to Asia and the rest of Eurasia.
It is proposed that the tunnel start on the United States side, from the town of Cape Prince of Wales, which has a population of 156 and about 80 buildings, including a large school, streets and general store, and end at the Russian settlement of Naukan or north at the Dezhnev settlement. The Bering Strait Tunnel would consist of 3 tunnels connecting Alaska and Russia by going through two islands (the Little Diomede(USA) and Big Diomede (Russia)). The longest single tunnel would be . Since the Bering Sea at the proposed crossing has a maximum known depth of only , it is proposed that the tunnel be dug using conventional, modern tunnel boring machines, of the type that was employed in the construction of the Chunnel. The three tunnel proposal would be much preferred over a bridge for a variety of reasons including that fact that during the winter months, the Bering Strait is iced over and a bridge would be subject to severe environmental conditions. Further, in most cases, tunnels are less expensive to construct and maintain. Suspended under water tunnels are not suggested for this crossing, because of the shallow depth of the Bering Strait
It should be noted that presently, many tunnels around the world are as long as the longest tunnel needed to complete the Trans-Global Highway. The "Chunnel" linking England with Europe is approximately long, the ocean tunnel Seikan linking Hokkaidō with Honshū in Japan is long, while the new Swiss Gotthard Base Tunnel through the Alps, currently under construction, will be long. There are in fact, 5 tunnels over 30 miles in length, in existence today.