By 1954, with the Cold War well underway, the U.S. government realized the quickest way to get a nuclear bomber from Russia to America was to go right over the Arctic Circle. If we wanted any chance of preventing a nuclear apocalypse, we needed to know if Soviet bombers were crossing the North Pole as soon as possible. The Army planned to build 63 manned radar stations in the high Arctic around the 69th parallel (200 miles north of the Arctic circle) as a result. And to transport all the necessary material that far north, it would have to get creative.
— The Incredible Story of the US Army’s Earth-Shaking, Off-Road Land Trains, by Peter Holderith