Russian Railways boss Vladimir Yakunin has proposed an idea for a train and road network that would link on either end with networks in Europe and Asia. This superhighway, which would run about 20,000 km (12,400 miles) in length, would make it possible for drivers to travel from London all the way to New York. It could also be used to build pipelines for oil and gas as well as infrastructure for electricity and water supplies. One caveat: the superhighway comes with a sky-high price tag that could be trillions of dollars. Continue reading for more.