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Analysis of residual capacity for future traffic growth was also performed for the intersection. <br />Residual capacity is expressed as the percentage increase in total entering traffic beyond the existing <br />turning counts that would result in any individual leg operating at LOS E (delay greater than 35 <br />seconds). Increases in traffic flow were assumed to occur equally on all legs until one leg reached <br />LOS E. <br />The 2030 AM and PM peak hourly traffic forecasts prepared by Spack Consulting, as illustrated in <br />Figure 1, were used for this analysis. <br />OPERATIONAL ANALYSIS RESULTS <br />Ramsey Parkway and Sunwood Drive (ARCADY Analysis) <br />LOS for proposed initial roundabout configuration <br />The operational analysis was performed with the traffic forecasts provided for the interim lane <br />configuration shown in Figure 2. The overall intersection levels of service and anticipated delay with <br />a break down by approach are listed in Table 1. <br />Table 1. Ramsey Parkway & Sunwood Drive — Proposed Initial Lane Configuration <br />Overall Intersection Average Delav By Approach <br />Peak Hour Analysis Level of Service SE - Driveway EB - Sunwood Dr. NB - Sunwood Dr WE - Ramsey Pkwy <br />Condition Level of Average Level of Average Level of Average Level of Average Level of Average <br />Service Delay Service Delay Service Delay Service Delay Service Delay <br />AFv1 Calibrated A 4.4 A 4.2 A 3.8 A 4.7 A 4.6 <br />PM Calibrated A 6.9 A 6.6 A 4 7 A 8.5 A 6.8 <br />LOS Source: 2010 Highway Capacity Mvfarrua- tlrrsigrralized irrtersectrons L'e:a. Seconds <br />The eastbound Sunwood Drive predicted 95th percentile queue is 1 vehicles (20 feet) in the PM peak <br />period. <br />The residual capacity for the AM and PM peak hours is also listed below. <br />AM: NB congests with a 159% increase in traffic growth above the 2030 <br />traffic volumes. <br />PM: NB congests with a 39% increase in traffic growth above the 2030 <br />traffic volumes. <br />The ARCADY operational analysis data is documented in Appendix A, pages A.1.1 thru A.1.3 <br />LOS for potential ultimate roundabout configuration <br />The operational analysis was performed with the traffic forecasts provided for the ultimate lane <br />configuration shown in Figure 3. The overall intersection levels of service and anticipated delay with <br />a break down by approach are listed in Table2. <br />e <br />Ourston <br />Roundabout <br />Engineering <br />Operational Analysis <br />Ramsey Parkway & Sunwood Drive <br />Ramsey, Minnesota <br />Page 2 <br />