U.S. Federal Route 31W is a north-south highway in Central Hart County. This runs from the Barren/Hart County Line to the Hart/Hardin County Line, via Mundfordville. U.S. Rt. 31W passes through the following towns in Hart County. Horse Cave Rowletts Munfordville Bonnieville U.S. Rt. 31W is multi-plexed in Hart County. Kentucky State Route 88, near Munfordville. Kentucky State Route 728, near Bonnieville. U.S. Rt. 31W intersects the following highways in Hart County. Kentucky State Route 218, at Horse Cave. Kentucky State Route 335, at Rowletts. Kentucky State Route 88, near Munfordville. Kentucky State Route 88, at Munfordville. Interstate 65, near Munfordville. Kentucky Secondary State Route 1140, near Munfordville. Kentucky State Route 728, near Bonnieville. Kentucky State Route 728, at Bonnieville.
