U.S. Route 31 (US 31) is a part of the United States Numbered Highway System that runs from Spanish Fort, Alabama, to the Mackinaw City, Michigan.
Indiana | Indiana University | Indiana Jones | Fort Wayne, Indiana | Evansville, Indiana | South Bend, Indiana | Allen County, Indiana | Terre Haute, Indiana | U.S. Route 66 | U.S. Route 1 | Indiana State University | Bloomington, Indiana | Gary, Indiana | Vincennes, Indiana | U.S. Route 6 | U.S. Route 101 | Indiana University Bloomington | Indiana Jones and the Temple of Doom | Route 66 | U.S. Route 30 | New Jersey Route 4 | European route E65 | U.S. Route 40 | California State Route 1 | Valparaiso, Indiana | Indiana House of Representatives | Governor of Indiana | Aboite Township, Allen County, Indiana | Wayne Township, Allen County, Indiana | U.S. Route 1 in Maine |