U.S. Federal Route 40 is the main east-west highway Central Fayette County. This runs along the Interstate 70 corridor. U.S. Rt. 40 passes through the following towns in Fayette County. Vandalia
Bluff City Brownstown St. Elmo U.S. Rt. 40 is multi-plexed in Fayette County. Illinois State Route 185, from near Vandalia to near Bluff City.
Photo courtesy: Paul Dienhart A BGS on WB I-70. A Fayette County mile marker. A junction marker on WB U.S. Rt. 40/IL St Rt 185. WB U.S. Rt. 40/IL St Rt 185 near Vandalia. A junction marker on SB U.S. Rt. 51. A set of guide markers from when IL St Rt 140 ended in Vandalia.