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.[ 1967 ex.s. c 85 s 5.]