stone free or die: .
<"Beware misinformation, and keep on the right track"
... <-- ... -- <Z legend of CG> -- ... --> ... >
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So, let's ignore the diversionary fireworks and again reiterate that this game does NOT end in a railroad mate (RRM).
The railroad mate involves trapping the enemy king between the "rails". The queen travels on one rail, the rook on the other, chug-chug-chugging the king straight along either a file or rank.
It ends up as an edge mate position, or with a stop (the original nomenclature for the final position was either RRM-diag or RRM-ortho, now more commonly called a Kill Box or Triangle Mate [I forget which is which]).
The mate was "invented" by <Z Legend> (in one or another of his many guises!), along with Balestra and Escalator Mates, over on ChessTempo. Here's a good RRM description (one that can be trusted for accuracy):
Here's a good example:
<Example 1 - (White to move, one branch involves RRM)>
Note that the last example demonstrates a feature of the RRM - it has a "coloring" (so here the Q+R skip over those squares on the rails controlled by the opponent).