While learning about loops, folded loops, dog bone loops, folded dog bone loops, twisted loops with overpasses, twisted loops with crossovers, and double mainlines...and having an aversion to reversing loops, I copied ideas from a lot of sources and created this design, using 103' of Rokuhan track, which fits on a 36"x80" hollow core door...if the budget would only allow.
In my mind, this is a one or two person operation. The yardmaster breaks down and builds freight trains as required. Always using the right hand rule of operation, the freight engineer exits the yard to the left and then picks up and spots cars at industrial areas A, B, C and the interchange track D...in that order...and then returns to the yard. The trip out is fairly short. The trip back is a nice long run. If you miss your crossover, just keep going forward and make another loop around the layout.
Freight trains use the pink turnout to cross from the red to blue track and the turquoise turnout to cross from the blue to the red track. Note that because of where these turnouts are placed, there are NO voltage reversing loops. It was very hard to compress the tracks under the yellow overpass and still leave enough room for 3% inclines. The plan is to use 3% risers from Woodland Scenics to create the inclines.
And if the kids want to operate...let one run on the red track and one run on the blue track. A great deal of caution needs to be taken at the crossings when more than one person is operating on the mainlines. Since they are operating under the right hand rule, the trains will pass each other a lot...which is always interesting to see. Their first lesson with turnouts would be learning to use the passing tracks below the yard.
All the curves, outside the yard, are eased and the minimum radius is 195mm (7.7").
You can have it fast, cheap or good...pick two.