I'm sorry flecc, but I'm with woosh on this topic. We already have driverless vehicles, . What added value a train driver brings is questionable. In a era when we can send non human controlled vehicles to the edge of the solar system, it is feasible . The requirements to segregate traffic depending on size, stopping distances is well understood, but political reluctance is what is stopping progress, not technical prowess.
I can see a day when there is a Transworld railway system, possibly in tubes aka hyperloop, with high speed goods transfer from China, through Russia, across the straits to Alaska and down to the tip of south America. With links into mainland Europe and a connection from Spain via tunnel into Africa. .