One of my major thrusts is in operations. As such, it is my desire to see every carload with a "place to go to". Whether this is a "pass through" deal or a place on the layout makes no difference. Every carload is accounted for.
This makes my layout roughly 75% "pass through" and 25% terminate on the layout traffic..... excluding coal which is 100% on layout. (Three mines with a capacity of 15 cars each. Emptys in - Fulls out.)
With three different lines all coming into the town. (NKP from the North. B&O from the South. PRR running East/West.) Direction of travel is important, as is changing "lines".
Worse, I have nearly two hundred pieces of rolling stock and 25 engines. (I should end up with 250 and 25, with my "last" layout.) So, by the time I gather 10-12 route cards for the "train" and a lead card for the "train", I have a handfull of cards to carry about as well as a teathered throttle.
At present I have very little in the way of "office space" for the sorting of cards.... one of my "little errors". I will have to allocate "office space" for the sorting of "on layout" cards. (My "Off layout" cards are well taken care of. As is "On layout" space for "Parked Cars".)
Here's the twist.... the "sorting space" will take up some room. How much is yet undetermined. It, in turn, will eat into my isle space which then makes it harder to reach my shelves which hold my "Off layout" cars.
Problems. Problems. (Heh heh!)