Kentucky State Route 166 is a east-west highway in Southern Fulton County. It runs from Fulton to near Schucks. KY St Rt 166 passes through the following town in Fulton County. Fulton KY St Rt 166 is not multi-plexed in Fulton County. KY St Rt 166 crosses the following highways in Fulton County. U.S. Rt. 51, at Fulton. Julian M. Carroll Purchase Parkway, at Fulton. (NO INTERCHANGE) Kentucky Secondary State Route 1909, near Fulton. Kentucky Secondary State Route 1706, near Fulton. Kentucky Secondary State Route 1125, near Fulton. Kentucky State Route 781, near Jordan. Kentucky State Route 239, near Jordan. Kentucky Secondary State Route 1127, near Jordan. Kentucky State Route 116, near Schucks. Kentucky Secondary State Route 2140, near Schucks. Kentucky State Route 125, near Schucks.