U.S. Route 31W (US 31W) is the westernmost of two parallel routes for U.S. Route 31 from Nashville, Tennessee to Louisville, Kentucky. At one time, it split with U.S. Route 31E at Sellersburg, Indiana, crossing into nearby Louisville via the Kentucky & Indiana Terminal Bridge. Tennessee State Route 41 (SR 41) is its unsigned companion route in Tennessee. During the December 2021 tornado outbreak, an EF-3 tornado devastated stretches of US 31W in Bowling Green, Kentucky.