Planning and design standards established for highways falling within the scenic and recreational highways system may include, but shall not be limited to, provision for the following:

(1) Hiking, bicycle, and bridle trails, including regulations for their use;

(2) Campsites and shelters;

(3) Boat launching sites;

(4) Access trails to lakes, rivers and streams, and easements along their shores;

(5) Safety rest areas;

(6) Historic and geologic interpretative facilities;

(7) Scenic observation facilities;

(8) Roadside landscaping, restoration and aesthetic enhancement;

(9) Specifically delineated highway corridors and means for the preservation of natural beauty, historic sites, or viewpoints;

(10) A uniform system of signs and markers designating the various features and facilities of the scenic and recreational highway systems.