I searched all over the forum for an answer to this with no luck so I thought I would ask. It is just an odd question that I haven't really seen any good images that support the answer. When trains are assembled in a yard, are the cars considered to have a front and back? Is the brake wheel considered to be on the head end or back end of the car and is there and attempt to have the brake wheels all at the same end of the cars in a consist. Example: All brake wheels on the head end of a car so that the brakeman knows which end of the car to go to when setting the brake.