Open-top operation idea - does anyone do this?

[nkp_174]

My trackplans are based around using a helix to connect multiple decks and staging. That way, I can have loaded pineapple cars or coal cars (dependent upon OR&L or DSP&P) move in one direction around the layout and empties in the other. Thanks to the helix, the staging yards is the same for traffic going in either direction. Such a design makes the setup in between operating sessions to be far easier for cars with visible loads...and allows for continuous (display) running to have the loads or empties going in the proper direction. The same could be accomplished with a simple oval. The helix adds flexibility. To quote one of my engineering professors, the difference between a good plant (layout) and a bad plant is the addition of a few extra pipes (tracks) to provide the operator with flexibility.

Michael