Wenn damit eine Eisenbahngesellschaft gemeint ist, ja. Wenn man vom Schienennetz spricht, nein.

Hinweis: German wird immer groß geschrieben, egal ob railroads dahinter steht oder nicht... ;-)

If you are wrting English, the word is "railways", not capitalised. American may be different.

American: 'railroad' is not capitalized except in the usual places: titles, beginnings of sentences, and in proper names, e.g., 'the Union Pacific Railroad'. Note that to save space, 'railroad' is sometimes abbreviated to RR, as in 'RR XING'.