Martin Wallace is a very famous British game designer and many of his games centre around trains: building routes, buying shares, collecting and using resources. Three of his most famous games are Age of Steam, Steam and Railways of the World (co-designed with Glenn Drover). They share certain similarities and design elements and range from medium difficulty (Railways of the World) to the more heavyweight end of the spectrum (Age of Steam).
In 2016, Via Nebula was published by Space Cowboys and if you've not come across this game before I'd imagine you're wondering round about now what trains have got to do with anything? Bear with me.