U.S. Federal Route 18 runs east-west across Northern and Central Floyd County. From the Cerro Gordo/Floyd County Line to near Charles City, this runs along the Avenue of Saints corridor. It is a multi-lane highway, with speeds near a posted 65 M.P.H. U.S. Rt. 18 passes through the following town in Floyd County. Charles City
U.S. Rt. 18 is multi-plexed in Floyd County. Iowa State Route 27, from the Cerro Gordo/Floyd County Line to near Charles City.
U.S. Rt. 218, from near Floyd to near Charles City.
EB U.S. Rt. 18/SB IA St Rt 27 near Nora Springs. EB U.S. Rt. 18/SB IA St Rt 27 near Floyd. A guide marker on EB U.S. Rt. 18. WB U.S. Rt. 18; NB U.S. Rt. 218/IA St Rt 27 at Floyd. NB U.S. Rt. 218/IA St Rt 27 near Midway. EB U.S. Rt. 18; SB U.S. Rt. 218/IA St Rt 27 north of Charles City. A junction marker on NB BUSN U.S. Rt. 218. A guide markes on the ramp from EB U.S. Rt. 18; SB U.S. Rt. 218/IA St Rt 27. A old BGS on EB U.S. Rt. 18; SB U.S. Rt. 218/IA St Rt 27. EB U.S. Rt. 18; SB U.S. Rt. 218/IA St Rt 27 near Charles City. A guide sign on the ramp from NB U.S. Rt. 18/IA St Rt 27. A BGS on NB U.S. Rt. 218/IA St Rt 27. EB U.S. Rt. 18/NB BUSN U.S. Rt. 218 north of south U.S. Rt. 218/IA St Rt 27. EB U.S. Rt. 18/NB BUSN U.S. Rt. 218 at IA St Rt 14.
