A project begun in August 2017, when Grigory Yaroshenko and his team set out across almost the entire country - tens of thousands of kilometres by plane, train, car and boat - to photograph the Russian railway network: the people who lay the track, build the bridges, bore the tunnels, service the trains and design new technology, and the largely invisible inner life of a system that runs on its own rhythms, rules and private language. Thousands of photographs and terabytes of video and sound resulted in a book about the strength and beauty of the railways and the people who have given their working lives to them, likened here to rivers or arteries carrying everything a country needs to function - including, for some towns, still only the hope of one day hearing a train arrive.