Illinois State Route 84 is the main north-south highway in Western Carroll County. It runs along the eastern banks of the Mississippi River. IL St Rt 84 passes through the following towns in Carroll County. Savanna
SB IL St Rt 84 near the Mississippi Palisades State Park. EB U.S. Rt. 52/IL St Rt 64; SB IL St Rt 84 in Savanna. A junction marker on EB U.S. Rt. 52/IL St Rt 64; SB IL St Rt 84. SB IL St Rt 84 south of Savanna. A Carroll County mile marker. SB IL St Rt 84 north of Thomson.
