These articles have not yet been started, or if they have, they were started with different article titles (in which case a redirect needs to be created).
This list was assembled by looking at existing railroad and railway articles on Wikipedia for "red links" within the text of the articles. These are topics that other authors have felt deserve articles of their own, so in a way, they have been requested (although exceptionally few of them show up on the Wikipedia:Requested articles list)