Transcontinental arch is a type of railway transportation that involves the movement of trains across continents. This mode of transportation is often used to transport passengers and freight across long distances, and is an important part of the global transportation system. Transcontinental arch typically involves the use of a combination of rail lines, bridges, and tunnels to facilitate the movement of trains between different continents. This type of transportation is often seen as a cost-effective and efficient way to move large amounts of goods and people between different parts of the world.