Illinois Route 116 is an east-west route through central Illinois, a bit north of Illinois's exact center, and it spans almost the entire width of the state. It runs through Peoria, Pontiac, and many other towns.
Intersections will be listed from east to west. The eastern end is at US Route 45 in Ashkum:
At a junction where Illinois 94 bends to the east along an old alignment of US Route 34 in Biggsville, Illinois 116 comes to an end. It's a bit of a strange and random place for the route to end, less than a mile north of the real US Route 34 at some stop sign.