If you'd like to read about the Russian Emperor's abdication, and why it took place aboard the royal train, and how the royal trains were constructed and decorated into luxury travel accomodations for the head of the Russian people check out these links:
http://www.angelfire.com/pa/ImperialRussian/royalty/russia/train.html
http://www.rautatie.org/web/en/collections.asp#3
http://www.rawsonplace.esmartdesign.com/notebook/Commissioner-08/notebook.htm