Here are a few links to miscellaneous, libertarian-leaning articles which might serve as starting points on the general topic of railroads and government intervention. You might want to read some more of Thomas DiLorenzo, especially his book on the history of American capitalism, and Rothbard's book A History of Money and Banking in the United States, mentioned in the DiLorenzo essay whose link is below.
- http://www.libertarian.co.uk/lapubs/histn/histn045.htm
- http://www.lewrockwell.com/dilorenzo/dilorenzo73.html
I am very certain there's much more scholarship that exists on this subject, but I think what I've provided will give you some ideas as to where you might find it.
Democracy does little else but depose one tyrant and install a nation's worth in his place.