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C. Build Traffic Volumes <br />When combined, the site -generated traffic volumes and No -Build scenario traffic volumes result in the <br />Build scenario traffic volumes, shown on Figures 8 and 9 for the 2026 and 2040 design years, respectively. <br />D. Intersection Operational Analysis Description <br />The operating conditions of transportation facilities, such as roadways, traffic signals and stop -controlled <br />intersections, are evaluated based on the relationship of the theoretical capacity of a facility to the actual <br />traffic volume on that facility. Various factors affect capacity including travel speed, roadway geometry, <br />grade, number of travel lanes, and intersection control. The current standards for evaluating capacity and <br />operating conditions are contained in the 6th Edition of Highway Capacity Manual, published by the <br />Transportation Research Board. The procedures describe operating conditions in terms of driver delay <br />represented as a Level of Service (LOS). Operations are given letter designations with "A" representing <br />the best operating conditions and "F" representing the worst. Generally, level of service "D" represents the <br />threshold for acceptable overall intersection operating conditions during a peak hour. The Chart below <br />summarizes the level of service and delay criteria for signalized and unsignalized intersections. <br />LOS Designation <br />Signalized Intersection <br />Average Delay/Vehicle (Sec.) <br />Unsignalized Intersection <br />Average Delay/Vehicle (Sec.) <br />A <br />< 10 <br />< 10 <br />B <br />> <br />10-20 <br />> <br />10-15 <br />C <br />> <br />20-35 <br />> <br />15-25 <br />D <br />> <br />35-55 <br />> <br />25-35 <br />E <br />> <br />55-80 <br />> <br />35-50 <br />F <br />> 80 <br />> 50 <br />A final fundamental component of operational analyses is a study of vehicular queuing, or the line of <br />vehicles waiting to pass through an intersection. An intersection can operate with an acceptable Level of <br />Service, but if queues from the intersection extend back to block entrances to turn lanes or accesses to <br />adjacent land uses, unsafe operating conditions could result. In this report, the Industry Design Standard <br />95th percentile queue length is used. The 95th Percentile Queue Length refers to that length of vehicle <br />queue that has only a five -percent probability of occurring during an analysis hour. <br />Traffic Impact Study <br />S2 Traffic Solutions <br />Page 17 Sotarra - Trott Brook <br />August 10, 2021 <br />