Kentucky State Route 237 is a north-south highway in Boone County. This connects Union to Burlington, via U.S. Rt. 42/127 and KY St Rt 18. KY St Rt 237 passes through the following towns in Boone County. Francisville Sugartit KY St Rt 237 is not multi-plexed in Boone County. KY St Rt 237 intersects the following highways in Boone County. Kentucky State Route 8, near Francisville. Kentucky Secondary State Route 2846, near Bullittsville. Interstate 275, near Burlington. Kentucky State Route 20, near Burlington. Kentucky Secondary State Route 3168, near Hebron. Kentucky State Route 18, near Burlington. U.S. Rt. 42, near Union. U.S. Rt. 127, near Union.