Illinois Route 116 is a 176.07-mile-long (283.36 km) cross-state rural state highway that runs from U.S. Route 34 by Gladstone east to the intersection of US 45 and Old US 45, on the north side of Ashkum.

U.S. Route 34 (US 34) is an east–west highway In the state of Illinois that runs from the Iowa state line at Gulfport, west of Galesburg, to Illinois Route 43 (IL 43) and Historic U.S. Route 66 at Harlem Avenue in Berwyn. The entire highway in Illinois is named the Walter Payton Memorial Highway after Pro Football Hall of Famer Walter Payton, who wore #34 for the Chicago Bears. The highway is 211.37 miles (340.17 km) long within the state.