Here in the UK, because we has loose coupled wagons from historic times, each wagon had pneumatic bumpers (buffers). At the end of each track in a good yard, there would be equivalent buffers to match the buffers on each wagon and loco.
I have been modelling US outline for about 50 years but never understood what you put at the end of freight yard or loco sidings. A central bumper would destroy the knuckle coupler.
Can anyone tell me what I put at the end of tracks?
Liks to photos - real ir model, would be good.
David