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The Engineering Design and Development Standards (EDDS) establish standards for safety, construction, mobility, maintenance, and water quality for transportation (including complete streets infrastructure), drainage, and utility facilities constructed in the county.

(1) A copy of the EDDS, including proposed amendments and revisions, shall be available on the department’s website.

(2) The EDDS may be amended or revised by the engineer in accordance with the rule making provisions in chapter 30.82 SCC, the policies in this title and sound engineering practices. The engineer, when amending or revising the EDDS, shall develop and adopt design criteria, standards and guidelines based upon recognized best practices in road design, construction, and operations including, but not limited to the criteria in subsection (4) of this section.

(3) The engineer may adopt and incorporate into the EDDS, by reference, other federal, state and local design standards and specifications and other professionally accepted engineering standards and specifications.

(4) When amending or revising the EDDS the engineer, to the extent practicable and allowed by law, shall incorporate complete streets infrastructure into public and private road network elements to create a comprehensive, integrated, connected transportation network that balances access, mobility, health and safety needs of pedestrians, bicyclists, transit users, motorists, emergency responders, freight and users of all ages and abilities. The engineer shall be guided by consideration of the following:

(a) Best practices criteria, including:

(i) Needs of all users are fully considered;

(ii) Function and classification of the road;

(iii) Integration of innovative and non-traditional design options;

(iv) Need for transit emphasis corridors and station areas;

(v) Needs of the current and future corridor users; and

(vi) Character of the project area.

(b) Exemptions or deviations may be appropriate when any of the following apply:

(i) A documented absence of current or future need exists;

(ii) The facilities would provide for a use or uses of the right-of-way prohibited by law;

(iii) The cost of establishing the complete street infrastructure is excessive in relation to total project cost or would be disproportionate to the current need or probable future uses;

(iv) There are safety risks that cannot be overcome; or

(v) There are topographic, environmental, historic, natural resource, or right-of-way constraints within the limits of the project that impact at least 25 percent of the lineal footage of the new travel way and pedestrian facility improvements for half street improvements. For full improvements each side shall be considered and calculated separately. (Added by Ord. 85-051 § 3, July 3, 1985; Amended by Ord. 96-028 § 9, June 12, 1996, Eff date June 29, 1996; Amended by Ord. 19-014, May 22, 2019, Eff date June 2, 2019).