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3. The design of intersections on arterial streets shall be in accordance with the WSDOT <br />Design Manual, current edition. <br />4. Separation of intersections shall be in accordance with WSDOT Design Manual, current <br />edition. <br />D. Residential streets should be designed to direct traffic to collector streets and adequately provide <br />for circulation and movement within the subdivision. <br />E. Vertical Alignment - Connection with existing streets shall be smooth transitions and existing <br />grades shall be shown for at least 150 ft on all sides of the connection. Vertical alignment designs <br />shall be in accordance with the applicable WSDOT or AASHTO Design Manual. <br />F The grade and ground lines of all streets that dead end, except cul-de-sacs, shall be continued for <br />500 ft beyond the proposed construction, unless that property is under different ownership. The <br />grade and ground lines of all arterials shall be designed to continue 1000 ft beyond the end of <br />proposed construction unless that property is under different ownership. <br />G. Sight Triangle Standards shall be in accordance with the WSDOT Design Manual, current edition. <br />Site triangles shall be shown on the preliminary and final land segregation documents. Site <br />triangles shall apply to all private and public roads. Plat notes and covenants shall reflect that site <br />triangles shall be kept free of all trees, bushes, landscaping, fences or obstacles. <br />H. Street Projections into Future Adjoining Subdivisions. <br />1. The location of proposed streets shall allow for the proper conveyance of the storm <br />drainage system. <br />2. Where a street is indicated to dead end into an adjacent unplatted area, the applicant <br />shall provide easements or written approval from the adjacent landowner to discharge his <br />storm drainage from the street onto the adjacent land. <br />3. Stub streets shall end at the property line with a temporary cul-de-sac or other <br />turnaround per KC Standard Plan 9-10. <br />4. Type III barricades shall be permanently installed at the end of all stub streets that do not <br />end in a cul-de-sac or turnaround. <br />I. The County Engineer may determine that the AASHTO's Policy on Geometric Design of Highway <br />and Streets, current edition, can be substituted for the WSDOT Design Manual on a case-by-case <br />basis. <br />12.04.04.050 Private Roads. <br />Although community local access roads are usually best served by public roads, owned and maintained by <br />the county, private roads may be appropriate for some local access roads for residential, commercial, or <br />industrial uses. At the discretion of the county engineer, proposed private roads within an adopted Urban <br />Title 12 Kittitas County Code' Draft No. 5— Working Draft for Adoption 6/12/2018 <br />39 <br />