Unless otherwise indicated herein, the terms used in this Chapter shall mean the following:
(1) "Louisiana Colonial Trails" means a system of trails or roads identified as the migration route of the Camino Real in the western part of the state from Natchitoches to the Texas border and the Harrisonburg Road from Natchitoches through east central Louisiana to the Mississippi River.
(2) "Scenic highway" means those designated modern day roads which parallel the colonial trail and is a route with significant scenic, historical, and recreational features by which tourists can travel across central Louisiana.