As used in this chapter, unless the context otherwise requires:
(1) “Parkway” means and includes parkway areas of varying widths principally through rural areas with sightly, landscape, scenic, safety, and wayside development grants and easements, with minimum frontage and private access rights, featuring a parkway road designed primarily for passenger car traffic and specifically adapted to leisurely travel as a tourway for outdoor recreation and market-to-farm use by tourists, including service and recreational facilities and the preservation of scenic, historic, and scientific features;
(2) “Scenic, landscape, sightly, or safety easement” shall mean a servitude devised to permit land to remain in private ownership for its normal agricultural, residential, or other use consistent with parkway purposes determined by the Secretary and at the same time placing a control over the future use of the area to maintain its scenic, landscape, sightly, or safety values for the parkway in this state; and
(3) “Secretary” means the United States Secretary of the Interior;