226.290.  Interpretations. — The terms used herein, unless the context otherwise requires, shall be interpreted as follows:

  (1)  "Access" shall mean a public right and facility to enter and leave the parkway;

  (2)  "Frontage" shall mean the right of the private property owner to avail himself of the light, air and access to any public highway upon which his property abuts.  New frontage on the parkway need not be granted and present frontage may be provided only where authorized by the secretary, except through portions of incorporated areas or unincorporated villages exempted by the secretary;

  (3)  "Parkway area" shall mean all lands, waters, easements and other property, and interests thereon or therein used for any parkway purposes;

  (4)  "Parkway road" shall mean the public motor vehicle roadway as distinguished from any other ways constructed or existing within the land boundaries of the parkway.