It depends on a lot of factors, like the size of the town etc. traffic will increase if you make stations, promoting travel between cities. money can also be ma

It depends on a lot of factors, like the size of the town etc. traffic will increase if you make stations, promoting travel between cities. money can also be made by connecting factories with farms etc, fairly simple. you can go way complex with orders, like only depart when 50% full or 100% full, to optimize your lines.