(1) The minimum criteria and process for designating an arterial unit as multimodal are established in the department of public works administrative rules and are to include such factors as frequency of bus service, employment and population densities within one-quarter mile of the arterial unit, and availability of non-motorized transportation facilities.

(2) The lower travel speed standard applies to certain public facilities needed to support residential development. Public developments which use the lower travel speed standard to achieve concurrency shall provide additional transportation demand management under SCC 30.66B.166. The determination of whether or not a proposed development qualifies for the lower travel speed standard shall be based upon all of the following criteria with additional specificity provided by department of public works rules:

(3) The letter grades for roads classified as rural correspond to varying travel speeds, depending on the length of the specific arterial unit and the number of controlled intersections. The method used to determine the thresholds is established by department of public works rules in accordance with SCC 30.66B.080 based on the principles of the Highway Capacity Manual published by the Transportation Research Board.

(4) The letter grades for roads classified as urban correspond to varying travel speeds as established in the Highway Capacity Manual and depend on characteristics of the arterial.

(5) For urban arterials that are designated multimodal, a five mph reduction to the average travel speed is applied.

(6) The level of service for rural arterials designated in the comprehensive plan as carrying urban traffic shall be evaluated utilizing the level of service standard for urban arterials. (Added by Amended Ord. 05-092, Dec. 21, 2005, Eff date Feb. 1, 2006; Amended by Ord. 16-010, June 1, 2016, Eff date June 15, 2016).