Illinois Central Railroad Sign ,  celebrating the 150th and last anniversary of the Illinois Central Railroad: “For 150 Years, The Main Line of Mid-America”, 1851 – 2001. A beautiful sign of a now historic railroad. Metal measures 10″ x 12″, with rounded corners and an 1/8″ hole punched in each corner. Metal is .025 gauge aluminum. Find a great selection of railroad signs to decorate your train room walls and man cave and share your photographs with us on Facebook.