Let me get this straight

HI all,
Speaking out loud and getting to grips with SSD.
Im assuming that there is no difference between one track or the other as far as signal is concerned its really only split into two because of power distribution?.
You could race on only one track? You could for example come out of a 2 lane curve entering into a straight which splits into 4 then into 8 lanes then back to 4 then to two and normality again.

ie there is no track 1 or two in digital.. its just 1 track with ie the same signal but transposed onto multiple power tracks.

Ok next step if the above is true is this.
you could join two race circuits (lets say fred has a bunch of track he races on at home on a table top) and (bill has a similar setup) both have at one end just before and after the curve lets say, a splitter(like a pit lane) whos changeover is hard wired to a switch. In Fred mode these change overs are set to run on fred track only. But when fred n bill get together they connect their splitters(ie both race circuits are now together) YEs I understand one PB must be off. Flick the switch and now rather than taking the curve one continues onto other circuit.

Not that I want to do this Im just learning to think digital and trying to get it clear.

wish i had a kit in front of me to play with, I wouldnt have to think so much.