Michigan State Route 55 runs east-west across Central Roscommon County. It runs from the Ogemaw/Roscommon County Line, near West Branch, to the Roscommon/Missaukee County Line, near Merritt. MI St Rt 55 passes through the following towns in Roscommon County. Prudenville
Houghton Lake MI St Rt 55 is multi-plexed in Roscommon County. Interstate 75, near Prudenville.
NB I-75/WB MI St Rt 55 at the Roscommon/Ogemaw County. A BGS on NB I-75/WB MI St Rt 55. A junction marker on SB MI St Rt 18. SB MI St Rt 18/WB MI St Rt 55 at Knappens Creek. WB MI St Rt 55 west of south MI St Rt 18. WB MI St Rt 55 at 12th. WB MI St Rt 55 near Tudor Drive. WB MI St Rt 55 near Visnaw Street. WB MI St Rt 55 west of Roberts. WB MI St Rt 55 west of Maple. A junction marker on SB RCH 304. WB MI St Rt 55 west of Loxley Street. WB MI St Rt 55 at Houghton Lake Drive. A BGS on SB U.S. Rt. 127.
