The standards in parts 8820.9980 and 8820.9986 apply to designated natural preservation routes. In the case of reconstruction, the designer shall preserve, to the greatest extent possible, the existing profile, alignment, and cross section. In doing so, the designer shall consider the use of guardrails, retaining walls, and curb sections to protect natural amenities. To the extent practical, the designer shall include in the design landscaping, including native species, curving alignments, variable back slopes, variable ditch bottoms, limited clearing, and other means available to limit the impacts on the environment while still addressing public safety.
18 SR 32; 20 SR 1041
October 15, 2007