comman rail
In traditional block wiring, one rail is continuous throughout the railroad, and is the common rail. the other rail is electrically separated into various blocks, each with it's own switched feed , so that throttle #2 has one wire hooked to the common wire, and the other to the switch (I have use rotary switches for the last 30 years)
with this set up the power from throttle #2 is applied to both rails of a block when it's controlling switch is thrown to the throttle #2 position.
Bock wiring is really simple, but when, as I do you have provisions for six throttles, and some 11 blocks . you have a lot of wires. doing away with this, is a big selling point of DCC, but DCC should be cut up in to blocks, if only to help you quickly find that pesky short that will only show up when you have a visitor.
Bill Nelson