Walkaround DC wiring question. N Scale Electricians needed!

Model Railroader Layouts and layout building
1

I have an idea for wiring my DC N scale layout allowing from 1-4 operators at a time, using MRC tech 4 walk arounds. If I section off the wires connecting my four tables with switches would this work?

I drew up a schematic:

http://i32.photobucket.com/albums/d28/CanadianShield/wires.jpg

2

Looks like a throttle buss for cab control to me… Nothing new or am I missing something??

Jeff