I know nothing of trains, but I do know there are people out there for whom they are almost a religion. If I’m asking a stupid question, I apologize and only offer my ignorance as an excuse.
I’ve always wondered what the reasoning is behind attaching more than one locomotive to a train of railcars. Obviously, it’s so they can haul more cars, but why not just have each locomotive haul its load separately. Is it to save on labor? Is only one of the locomotives staffed, leaving the rest to be controlled from that engine?
If this is the case, is there a limit to how long a train can be? Could someone string together 30 miles of train if they had enough locomotives? Could you staff it with the same number of people needed on a single engine train? Is there a world record for this sort of thing? What are the limits set forth by whatever agency regulates such things?