In his Railhead trilogy science-fiction author Philip Reeve introduced a galactic interstellar railway system, the K-Bahn which is based on a network of K-gates, portal-like gateways utilizing an extradimensional non-space to achieve instant arrival after departure, thus "shortening the way".
Philip Reeve's Railhead trilogy introduced a futuristic transportation system known as the K-Bahn, which relies on a network of K-gates to facilitate rapid interstellar travel. This concept is similar to wormholes or other exotic transportation methods.