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B. ROLLING TERRAIN - natural slopes consistently rise above and fall below the road or <br />street grade, and occasional steep slopes offer some restriction to normal horizontal <br />and vertical roadway alignment. The slope of the existing terrain is from 5% to and <br />including 10%. <br />C. MOUNTAINOUS TERRAIN - longitudinal and transverse changes in the elevation of the <br />ground with respect to the road or street are abrupt, and benching and side hill <br />excavation is frequently needed to obtain acceptable horizontal and vertical alignment. <br />The slope of the existing terrain exceeds 10%. <br />Terrain classification pertains to the general character of the specific route corridor. Roads in valleys <br />or passes of mountainous areas that have all the characteristics of roads traversing flat or rolling <br />terrain should be classified as flat or rolling. In rolling terrain, trucks reduce their speeds below those <br />of passenger cars on some sections of roadway. Mountainous terrain is responsible for some truck <br />operation at crawl speeds. In cases where the terrain classification is in question, the County Engineer <br />shall make the final decision. <br />(Ord. 2015-010, 2015) <br />L=! <br />Chapter 12.3 <br />ROADWAY CLASSIFICATION* <br />Sections <br />12.03.010 Road Classifications. <br />12.03.010 Road Classifications. <br />County roads are classified functionally to define the part that they play in serving the flow of trips <br />through the road network. The function of a road is used to determine required right-of-way width, <br />road width, access spacing, intersection spacing, and other road geometrics. Functional classification <br />changes or additions of county roads can be initiated by the County, but are reviewed by WSDOT <br />and the Federal Highway Administration, who provides approval, denial, or conditional approval of <br />functional classification requests. <br />More information on functional classification, including the functional classifications of county roads, <br />can be found on the Public Works website. (Ord. 2015-010. 2015) <br />Chapter 12.4 <br />ROAD DESIGN CRITERIA <br />