Michigan State Route 18 is a north-south in Central Roscommon County. It runs from the Roscommon/Crawford County Line, north of Roscommon, to the Roscommon/Clare County Line, near Butman. MI St Rt 18 passes through the following highways in Roscommon Conty. Roscommon
Prudenville
MI St Rt 18 is multi-plexed in Roscommon County. BUSN Loop I-75, at Roscommon.
A junction marker on SB BUSN Loop I-75. SB BUSN Loop I-75/MI St Rt 18 at 4th Street. SB BUSN Loop I-75/MI St Rt 18 south of Roscommon. SB BUSN Loop I-75/MI St Rt 18 at I-75 south of Roscommon. SB BUSN Loop I-75/MI St Rt 18 at I-75 south of Roscommon. A BGS on NB I-75. SB MI St Rt 18 south of I-75/BUSN Loop I-75. SB MI St Rt 18 near Lansing Road. SB MI St Rt 18 north of MI St Rt 157. SB MI St Rt 18 at MI St Rt 157. SB MI St Rt 18 south of MI St Rt 157. SB MI St Rt 18 at east MI St Rt 55. A junction marker on SB MI St Rt 18/WB MI St Rt 55. SB MI St Rt 18/WB MI St Rt 55 at Knappens Creek.
