The Louie B. Nunn Cumberland Expressway is a 88.4-mile (142.3 km) freeway in the U.S. state of Kentucky, extending from Barren County in the west to Somerset in the east.

The expressway begins at Interstate 65 (exit 43) interchange between Smiths Grove and Park City.

It travels east through rolling farmland to its eastern terminus at US 27 on the north side of Somerset.

In the case of the Nunn, toll booths were removed in 2003 because of a bill in the United States Congress sponsored by Hal Rogers (R-KY), which included an appropriation to pay off the bonds on the parkway, as well as those of the Daniel Boone Parkway in southeastern Kentucky.

[1] On May 28, 2015, a new interchange was opened west of Glasgow to serve the western extension of the Veterans Outer Loop.

Upon completion of the new western extension of the Veterans Outer Loop, it includes the new on- and off-ramps of the Cumberland Expressway, and a new at-grade intersection with Kentucky Route 1297.