Tenn. Code Ann. § 54-12-101: Power to establish road improvement districts

The monthly county court is vested with the power at any regular, special, or adjourned session to establish road improvement districts for the purpose of building and maintaining public roads in the road improvement districts, and building bridges, culverts, and levees on the roads and to locate and establish the roads, or provide for these things being done whenever they are of public utility or conducive to the public welfare.