Interesting...never heard of it but I can't imagine how it goes. Since NTrak only has (at most) 5 tracks (red, yellow, blue, alt blue, green), I don't see how there can be 6 routes. Our club does have two ends that turns the trains back on themselves making it one huge run...red loops around and returns on yellow which returns on blue and then green which then connects to red. I didn't think that was possible either until it was done. I would be interested in seeing this myself.
I did see on the net that someone was referring to 'The Random Route' but it was part of a joke where a 0-2-0 was running on it. I'm wondering if it was a joke as well?
I know that I have the Locomotive Book from NTrak...somewhere, but I can't even think where to start looking. Maybe later today I'll see if I can find it.