runsforcelery wrote:In fact, a transport dragon is good for approximately 1,500 miles per day, but it can’t fly that entire 1,500 miles without rest stops. Average speed for a transport, allowing for periodic rests, is around 100 mph over the space of approximately 15 hours, allowing 9 hours per day for feeding, “maintenance,” and extended (as opposed to periodic stops) rest.
This means locomotives will require and average of 62.5 miles an hour, all day every day, to transport as fast as dragons. I can see them easily making that speed over good track, but in average conditions I don't know if the trains can do it. It should still be close though.
As for whether three million people is a lot, it depends on how they are distributed. If they all live in a few cities between the portals (exploiting natural resources in the area, and with very few small settlements further out) it could qualify as a lot of people.
In the same way Sharona won't build a rail road to every little town, I doubt Arcana would build sliders to every little place. I still doubt that there is some major undisclosed transport capability on either side, if there was it would have rated a mention at least.