Bill-you're most welcome!
Justin-Here's a link to LOTS of railroad songs:
http://www.spikesys.com/Trains/songs.html
Some of my personal favorites (coming from a 50+ year-old with lots of bluegrass and country-rock albums from the 1970's):
Old Train-Seldom Scene
Pan American-Seldom Scene
Glendale Train-New Riders of the Puple Sage
Life's Railway to Heaven-Amazing Rythym Aces
City of New Orleans-Bluegrass Alliance (uptempo version)
Coal Tattoo-Billy Edd Wheeler (more of a coal-mining song but talks about laying tracks "in the hole", the mine)
Yukon Railroad-Nitty Gritty Dirt Band
Silverton Train-C. W. McCall
Orange Blossom Special-Vassar Clements/Nitty Gritty Dirt Band