Firstly: you can post up to 10 images in one post.
Secondly: A shoving platform is used in the U.S. as a platform for the conductor to stand on, usually it is placed on the opposite end of the train as the locomotive, while preforming switching moves with a long train. They are also used in carfloat operations because most of the floats are barges with rails welded on them and cannot support the weight of a locomotive, although idler cars are more common on the latter, as it can be an unloaded car or a special car designed to be extremely lightweight with a cabin on it.