Where can I find online maps of old railroads in Western Pennsylvania?

Question

Specifically the Allegheny area...Perhap's I'm not looking hard enough, or that they simply aren't available, but either way, I could use some help. Most informative answer wins!

Answer 1

hey gal! you can find the maps in google earth ,in  google earth  zoom on in the w.pensylvania area if you could figure it out or type w.p in the search dialouge box in google earth. im sure you can locate your desired area.......by the way your yahoo pic looks cute......i think you look cute too!

Answer 2

Go to E-bay, and type in "Railroad Antique". There's always a bunch of 'em for sale for around ten bucks, for all the states.

Answer 3

This link should help.  It gives historic topography maps of most towns in Pennsylvania, which also includes most of the historic railroad right-of-ways as well.

Answer 4

Go to Association of American Railroads.com