Agenda - Council - 08/06/2018 - Laserfiche WebLink

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Existing Traffic Analysis A planning level congestion analysis was performed for the existing roadways based on the daily traffic and roadway capacity. Existing year 2015 traffic volumes and congestion levels for the roadways within the County are depicted on Figure 7. Roadway traffic congestion and operations are categorized by Level of Service (LOS) letter grades of "A" through "F". LOS A indicates the best traffic operation, with vehicles experiencing minimal delays. LOS F indicates that demand exceeds,, 'fighWay 169/HtgM wo; A ng capacity and that drivers experience significant delays and traffic congestion. The Metropolitan Council defines LOS D as the minimal acceptable LOS. Table 6 illustrates the LOS categories, approximate volume -to -capacity (V/C) ratios, and a general description of the traffic operations. The capacity of a roadway is a measure of its ability to accommodate a certain volume of vehicles. The factors affecting capacity include roadway geometric conditions such as number of lanes, design standards and traffic controls. At this planning level of analysis, the daily capacities for different roadway types were estimated based on the Highway Capacity Manual, the number of lanes, and the hourly per -lane capacity in the regional model. Table 7 summarizes the capacity for the different roadway types. Table 6 - Roadway Segment Level of Service Description Versus Volume-to-Capactiy Ratio Level of Voume-t escription Service ILCapacity Raba A <0.65 Low volumes and no delays B 0.65-0.75 Low volumes and speeds dictated by travel conditions C 0.75-0.85 Speeds and maneuverability closely controlled due to higher volumes D 0.85-0.95 Higher density traffic restricts maneuverability and volumes approaching capacity E 0.95-1.05 Low speeds, considerable delays, and volumes at or slightly over capacity. F >1.05 Very low speeds, volumes exceed capacity, and long delays with stop - and -go traffic. iION PLAN UPDATE CHAPTER 3- EXISTING CONDITIONS