Flawed Game Logic

[TrainDerailer]

To be honest, the only reason I got this game was curiosity about the trains.

Try this. Find a city that turns steel into cars. Build a steel plant and ship in ore.

The steel must be transported to ANOTHER city in order to be used at all.

I can understand why they might want to let you ship your steel somewhere else (although shipping goods doesn't reduce costs any).. is there no way to turn this off though?

[Anarchemitis]

Goods from a city cannot be resold to the same city.
It's a game balance thing so you can't have a train constantly taking and providing mail and commuters from City A to City A. You can't turn it off.
However, if you have a city nearby which also has a steel mill and auto plant, you could make a fortune with a train that just ships steel and cars back and forth.