[woodcote]

Not quite following what you doing,  could you just explain in a brief sentence? 

I'll try...

The blue wires in the image are soldered to underside of the rails in the shutdown section.

The longer answer being...

After my powered section I have a 3" section that is unpowered and isolated from both the proceeding powered section and following unpowered section. That next section is unpowered, but the left hand rail of each lane is connected by wire to the right hand rail of the same lane. As the car freewheels, the motor creates current which is then short-circuited by the cross-wire. This applies a reverse force to stop the motor (and hence driven wheels) turning - also the principle of dynamic braking in any 3-wire controllers hook-up. Without the dynamic braking, the car would coast a long way, requiring a lengthy shutdown.

Hope one or both helps!