Last but not least is the "highline" and locomotive yards. I have some sidings up here to allow for a diesel fueling area, maybe a partial round house over the TT tracks. The crossover is again a pair of switches that allow me to turn trains around so they can go back down to the lower levels. The empty area on the right will probably be a town or some industries. I'm not sure yet.
The bridges on this level and the mainline below it will allow for some dramatic relief where trains running on the tracks near the back wall to be seen peeking trough.
So, whaddya think? I'm sure it won't work out like this completely, but like Dwight Eisenhower said... plans are useless, but planning is indispensable - or something of that nature.