As The Vector Doctor says, virtually no railroad lettering is an actual font. It was all designed by hand, and in most cases, rarely a complete font, with all characters, upper and lower case or punctuation. An example is Norfolk and Western lettering for passenger cars, locomotives and cabooses. Only the letters used in Norfolk and Western were drawn. I've been in that field for almost 40 years, have now recreated most of the lettering and also developed letters not originally done. I've lettered a number of full sized cars, locomotives, cabooses, etc. etc. Google Norfolk and Western 611 for an example. The best is get a great photo from the side, direct on, and redraw in Illustrator or something like it. I'd be glad to do so if you can get me a decent image.
Best
Ken Miller