The Big Railroads
U.S., Canada, Mexico

^{items 9-29-22:} Union Pacific

Burlington Northern & Predecessors

Western Pacific

Santa Fe

Chessie in Michigan / Car Ferries

Canada

^{items 9-29-22} Southern Pacific

Rock Island

Illinois Central Gulf

North American Railroading:

A Train Order Primer

The Freedom Train

^{items 9-29-22:}Los Ferrocarriles Mexicanos

Also see the Maps and Timetables page for RR's not listed here

For more photos of northwestern U.S. railroads, visit Rob Jacox's Western Rails.

Another good site with tons O' photos of North American railroads is RailPictures.Net.