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Attachment 4 The new trips have been assigned to thesurrounding roadways according to the existing traffic patterns. In general, 65 percent will originate from and return to the east during the AM Peak, 60 percent will originate from and return to the west during the PM Peak, and 50 percent to and from the west during the Saturday Midday Peak.Figure 6 illustrates the trip assignment. Figure 7 illustrates the 2025 Build conditions by combining No-Build traffic with the trip assignment volumes. TrafficOperations The operating conditions of transportation facilities, such as roadways, traffic signals, roundabouts,and stop-controlled intersections, are evaluated based on the relationship of the theoretical capacity of a facility to the actual traffic volume on thatfacility. Various factors affect capacity including travel speed, roadway geometry, grade, number of travel lanes, and intersection control. The current standards for evaluating 1 capacity and operating conditions are contained in Highway Capacity Manual. The procedures describe operating conditions in terms of driver delay represented as a Level of Service (LOS). Operations are given letter designations with "A" representing the best operating conditions and "F" representing the worst. Generally, level of service “D” represents the threshold for acceptable overall intersection operating conditions during a peak hour. The Chart on the belowsummarizes the level of service and delay criteria for signalized and unsignalized intersections. Delay (sec) Level of ServiceDescription Unsignalized/ Signalized Roundabout A Primarily free-flow operation.0-100-10 B Reasonably unimpeded operation.>10-20>10-15 Stable operation. The ability to maneuver is C>20-35>15-25 more restricted than LOS B. Less stable operation. Small increases in flow D may cause large increases in delay and reduced >35-55>25-35 speeds. Unstable operation. Low speeds and E>55-80>35-50 considerable delay. Congested operation. High delay and extensive F>80>50 queuing. For side street stop-controlled intersections special emphasis is given to providing an estimate for the level of service of the minor approaches. Traffic operations at an unsignalized intersection with side street stop- control can be described two ways. First, consideration is given to the overall intersection level of service. This takes into account the total number of vehicles entering the intersection and the capability of the intersection to support these volumes. Second, it is important to consider the delay on the minor 1th Highway Capacity Manual (HCM),Transportation Research Board, 6Edition 3 | Page Ramsey County Environmental Service Center, Roseville, MN