Cars not hooked to locomotive should have brakes applied

[cam72cam]

(vacuum break system)

Should have some way of turning it on and off

[Kriegfox]

errr "Vacuum brake?" Converse with me on this, i'll learn ya about train air brake ;)

[SpudsMcCat]

It'd be interesting if cars where affected by gravity, (and didn't have autobrakes). you could then create a hump yard.

[km00700]

Make a tool that can manually release/engage brakes. (setting would be overruled while in a consist with a locomotive)