Illinois 111 is a north-south route from Morgan County, just south of I-72, south past Alton into the Metro-East. It connects a lot of towns to each other.
Intersections from north to south:
IL104 at Waverly
IL108 comes from the east
Then IL108 leaves west
Then IL111 joins US67 south
US67 leaves south as IL111 joins IL3 southeast
IL3 leaves south and intersects IL140 as IL111 joins IL140 east
IL111 leaves IL140 to go south close to Bethalto
IL143 by Wood River
IL111 ends in the south near Frank Holten State Park, near East St. Louis and Washington Park.
It passes through these towns: Waverly, Modesto, Palmyra, Hettick, Chesterfield, Medora, Brighton, Godfrey, Alton, Bethalto, Wood River, Pontoon Beach.