Business Kentucky State Route 80 is a 1.8 miles highway in Mayfield. It runs east-west from Interstate 69/Julian M. Carroll Purchase Parkway/BY-PASS U.S. Rt. 45/Kentucky State Route 80, on the westside of Mayfield to U.S. Rt. 45/Kentucky State Route 58/Business Kentucky State Route 121, in Downtown Mayfield. BUSN KY St Rt 80 passes through the following town in Graves County. Mayfield BUSN KY St Rt 80 is not multi-plexed in Graves County. BUSN KY St Rt 80 intersects the following highways in Graves County. Interstate 69, at Mayfield. Julian M. Carroll Purchase Parkway, at Mayfield. BY-PASS U.S. Rt. 45, at Mayfield. Kentucky State Route 80, at Mayfield. U.S. Rt. 45, at Mayfield. Kentucky State Route 58, at Mayfield.