Check out this video posted by a fellow model railroader
Sundance Central Railroad is comprised of four different railroads: one Fn3 scale and three On30 scale. The Fn3 is made up of 43 modules and is battery operated, and the Silverton & Central On30 is 8 modules. These are moved as needed in a tractor trailer to train shows and conventions as far west as Portland, Oregon. The Muskrat Ramble and the Dolly Varden Mine are also modular, but usually remain at the home railroad located in Odessa, Florida. The railroad was started in 2004 and has 6 members with unsurpassed modeling skills.