Tennessee Code Title 54. Highways, Bridges and Ferries § 54-5-708

(1)(A) Institutions that are located within ten (10) miles of an interchange on the federal-aid interstate system of highways shall be signed on the interstate highway system; provided, that all state community colleges may be signed on the highway system if the colleges are within nineteen (19) miles of an interchange on the highway system. Each institution meeting this criterion shall be signed at only one (1) interchange and shall be signed at the closest location, except where more than two (2) destinations are required to be signed at the same interchange. When this condition occurs, the two (2) closest institutions to the interchange shall be signed, with the remaining institution or institutions being signed at the second closest interchange;

(B) Notwithstanding any law to the contrary, any state community colleges that are within the service area of Roane State Community College, located in any county having a population of not less than forty thousand seven hundred (40,700) nor more than forty thousand eight hundred (40,800), according to the 2010 federal census, or any subsequent federal census, and located within five (5) miles of Interstate 75, must be signed pursuant to subdivision (1)(A) regardless of the number of students enrolled in the colleges;