Tenn. Code § 13-4-201
It is the function and duty of the commission to make and adopt an official general plan for the physical development of the municipality, including any area outside of its boundaries which, in the commission's judgment, bears relation to the planning of the municipality. The plan, with the accompanying maps, plats, charts, and descriptive and explanatory matter, shall show the commission's recommendations for the physical development of the area of the municipal planning jurisdiction and identify areas where there are inadequate or nonexistent publicly or privately owned and maintained services and facilities when the planning commission has determined the services are necessary in order for development to occur, and may include, among other things, the general location, character and extent of streets, bridges, viaducts, parks, parkways, waterways, waterfronts, playgrounds, airports and other public ways, grounds, places and spaces, the general location of public buildings and other public property, the general location and extent of public utilities and terminals, whether publicly or privately owned, for water, light, power, sanitation, transportation, communication and other purposes; also the removal, relocation, widening, extension, narrowing, vacating, abandonment, change of use or extension of any of the foregoing public ways, grounds, places, spaces, buildings, properties or utilities; also a zoning plan for the regulation of the height, area, bulk, location and use of private and public structures and premises and of population density; also the general location, character, layout and extent of community centers and neighborhood units; also the general location, character, extent and layout of the replanning of blighted districts and slum areas. The commission may from time to time amend, extend or add to the plan or carry any part of subject matter into greater detail.
T.C.A. § 13-4-201