Thanks for the input. I think I will try to use Central Portal Control because of the immediate Emit feature. I am "operating" a small local railroad in Central Pennsylvania. It receives and sends material from/to Wilkes-Barre, Pittsburgh, Philadelphia and Harrisburg. My original plan was to have a portal for each city. However, that did not seem to work, although I may investigate some more. The alternative is one portal managing several trains which Central Portal is designed for. The problem with it seems to be every train is identified with a consist number. I would prefer a name for each train
So, thanks for the inputs. A giant railroad sounds like a real challenge but age is a limitation.
Again THANKS