Tennessee Code Title 54. Highways, Bridges and Ferries § 54-12-125

The roads provided for in this part shall be surveyed and located along the general course of the present roads between the termini set forth in the report, unless there is some good and sufficient reason why the course should be departed from to secure a new, better, or shorter road, or for any other good reason and having due regard to the straightening and shortening of the existing roads and the reduction of the grades on the existing roads.