Model Railroad Economy

[Justinmiller171]

The classic paired industries on a model railroad layout is where cars would be running back and forth between the two industries - like a coal mine and a powerplant, or a mine and an ore processing plant - where you typically would try to place em back to back with a backdrop in between

There were many 4x8 track plans back in the day where 2 or more separate industries would ship freight cars to each other instead of to an interchange, for example: a lumber mill and a furniture maker. since 4x8s rarely had any interchanges they would simply make all of the industries ship cars to each-other.