1."Conservation area" means land in which the state department of transportation or the department of natural resources has acquired rights, other than that land necessary for a right-of-way.2."Great river road" means a scenic and recreational highway consisting of a designated system of roads and streets along the Mississippi river in this state.3."National parkway" has the same meaning as defined in Pub. L. No. 93-87, first session, Ninety-third Congress of the United States.4."Right-of-way" means land area dedicated to public use for a highway and its maintenance, and includes land acquired in fee simple or by permanent easement for highway purposes, but does not include temporary easements or rights for supplementary highway appurtenances.5."A scenic and recreational highway" means a public highway designated to allow enjoyment of aesthetic and scenic views, points of historical, archaeological and scientific interest, state parks and other recreational areas and includes both the right-of-way and conservation area.6."Scenic easement" means a servitude which is acquired by gift, purchase, exchange or condemnation and is designed to permit land to remain in private ownership for its normal agricultural, residential or other use and, at the same time, to restrict and control the future use of the land for the purpose of preserving, restoring or enhancing the natural and historic beauty of the land subject to the scenic easement.7."Secretary", "parkway", "scenic landscape", "sightly or safety easement", "access", "parkway road", "parkway development", "frontage" and other similar terms have the same meaning as defined in any Act of the Congress of the United States related to a national parkway.