OK, I did not have time last night to look up some of the old magazines with various types of systems described. But over the years there have been a lot.
Some people want these systems to be self resetting, or “continuous” in flow so they can stop and restart at any point.
But generally speaking that requires car cards and a pattern that is just endlessly repeated. - Ultimately boring in my view and a lot of work to set up.
Here is my basic problems with car card systems:
Handling all the separate cards is cumbersome, and it requires that you leave everything alone when not “operating”. I’m not doing that, if I want to randomly run a train and move cars around between formal operating sessions I’m going to. They are my toys.
Switch lists do require “reset” work, but allow constant change.
Also my mainline trains are typically big, 35-40 cars, 50 cars at times - mainline trains come into the freight yard, then get switched directly to the industries on my belt line connected to the yard, or they get set up into local freights for the industries out on the mainline.
So 50 separate cards for that incoming train is just not practical to me.
Yes switch lists require “setup” both on the paper side and in staging the layout. I don’t mind doing that. And if a session does not get completed it does not matter, the layout will get restaged for the next session.
My layout does not exist solely for formal operating sessions, so switch lists and prestaging works best for me.
Example, I have a large separate piggyback terminal planned for the layout. A switch list does not need to identify each car. Each of four tracks in the piggy yard will hold about 22 50’ flat cars.
The yard work “train manifest” can just say “Build train 456 - move the piggy cars on track 1 and 2 in the piggy yard onto track 4 of the freight yard and setup a caboose for westbound departure”.
Then a mainline train order can say “Train 456 with loco set 321 departs westbound from track #4 at 6:45am for points west (staging track C2)”.
And yes, I will likely use a fast clock, have passenger schedules, and approximate regularly scheduled freights. The mainline will be CTC controlled, especially for operating sessions.
There will be some “handling” of individual cars to small industries, but not all car movements will be handled that way.
Other operations will include power changes on thru freight trains, they pull in the yard, the power gets switched, they depart. There will be hidden staging for about 30 trains on the mainline.
For me “operation” is not just switching freight cars in and out of industries. It is simulating all the different types of train movements of the prototype.
Some trains will be “run thrus”, bridge traffic that does not stop at the yard, but rather just comes out of the staging, runs the whole mainline, and returns to staging.
The layout was carefully designed to provide a balance of all these different operating possibilities, including passenger train building/switching, commuter service with RDC’s and doodle bugs, local freights, mainline freights, and belt line switching in two separate areas.
And, if I can figure out a space, I would like to build a small stand alone waterfront industrial switching layout.
Sheldon