Looking at it, there is a quarter-circle missing of the outer track, bottom loop . . . between 3 and 6 O'clock . . . such are the raviges(?) of 30 years .I was going to ask whether the long siding to the left/lower was supposed to connect the right hand line through the station, but then I realized that would yet further complicate the wiring of the reverse loops.
That thing must be a beast underneath to wire the (interconnected) reverse loops. Bravo!
Not difficult . . . .
Basically, a twin track oval, controlled with a "Duo" (?) control box. I/we/my son, habitually used the two most outer tracks, through the station, adding interest as the trains changed lines over the points.
I would advise everyone to AVOID standard radius points. They are too tight, and will de-rail everything with a six-wheel, long wheelbase, bogie . . . tenders, mail vans, tank engines, etc.
You had/have, to be on the inner oval to use the "S" reverse direction, in the middle of the layout. You will see a little switch adjacent to the line half way along, just on the "grass", near the road. For me/us it was manual, but I'm sure it could have been wired to a remote switch, next to the controller. When working, it was covered with an old, demounted, van body . . . as a workmans' store/shed .
Edit: That is all on a standard 8' X 4' piece of 1/2" five-ply board, with 18" chopped of one end, so it could be stored against the lounge wall, behind full depth/height curtains. I should have mounted it on a 2" x 2" perimeter frame, as it has (inevitably) bowed a little over the years .