Illinois State Route 155 runs aprox. 11 miles in Western Randolph County. This highway runs from Illinois State Route 3 to Fort De Chartres Historic Site along the Mississippi River. IL St Rt 155 passes through the following towns in Randolph County. Ruma Prairie du Rocher
IL St Rt 155 is not multi-plexed in Randolph County. IL St Rt 155 intersects the following highway in Randolph County. Illinois State Route 3, at Ruma.
A junction marker on SB IL St Rt 3. The eastern end at Ruma. The eastern end marker. WB IL St Rt 155west of Ruma. A Randolph County mile marker. WB IL St Rt 155 near Ames. WB IL St Rt 155 near Prairie du Rocher. WB IL St Rt 155 in Prairie du Rocher. WB IL St Rt 155 at the flood gates near Prairie du Rocher. WB IL St Rt 155 at the other flood gates at Prairie du Rocher. WB IL St Rt 155 near Fort De Chartes. The western end of IL St Rt 155. The western end marker. The "0" mile marker.
