Yorkshire Railways from Steam to Modern TractionYorkshire Railways from Steam to Modern Traction 22. 50 Thirteen years elapsed between the publication of British Railways Modernisation Plan and the end of steam services on the national network. In this transitional period, modern traction worked alongside steam engines and was captured by enthusiasts across the country. Yorkshire offers an interesting insight into the changeover during the mid to late 1950s and much of the 1960s, as the two forms