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Ryan Streff October 4, 2013 City of Arden Hills Page 12 To address the poor operations at the County Road E/Old Snelling intersection under year 2018 (Phase 2) build conditions, modification of the existing traffic control should be considered. Potential mitigation includes installation of a roundabout or traffic signal. However, discussion with impacted stakeholders and City/County officials would need to occur prior to any decision. Furthermore, it is likely that the poor operations would occur for only a short period each day (i.e. one or two hours), which the City/County may deem acceptable giv associated with a roundabout and traffic signal. Therefore, for was assumed moving forward to illustrate the future impact of the proposed expansion. It should be noted that this intersection is expected to be approaching capacity by year 2018, regardless of the proposed expansion. Year 2025 (Phase 3) Build Conditions Intersection Capacity Analysis To determine if the existing roadway network with the planned Co reconstruction project can accommodate the year 2025 Phase 3 build traffic forecasts, a detailed traffic capacity analysis was completed. Although from a traffic volume perspective the Phase 3 condition is expected to generate less site trips than under Phase 2 conditions, it is likely that area developments and growth will likely continue to occur (i.e. background traffic). Therefore, the study intersections were once again analyzed using a combination of the Synchro/SimTraffic and HCM software. Results of the year 2025 (Phase 3) build operations analysis shown in Table 7 indicate similar operations to the year 2018 Phase 2 build conditions are expected. Once again, all study intersections are expected to operate at an acceptable overall LOS C or better during the a.m. and p.m. peak hours, with the existing traffic controls and assumed geometric layout, except the County Road E/Old Snelling intersection. During the p.m. peak hour, the intersection is expected to operate at LOS E (although near the LOS D/E threshold) with the existing all-way stop control. In addition to the poor LOS at this intersection, the 95th percentile queues in both the eastbound and southbound directions are expected to extend up to approximately 500 feet. No other significant delay or queuing issues are expected. Table 7.Year 2025 (Phase 3) Build Peak Hour Capacity Analysis A.M. Peak P.M. Peak Intersection LOS Delay LOS Delay County Road E and Old Snelling B E37sec. County Road E and Snelling Avenue West Ramps B 3 sec. B 6 sec. County Road E and Snelling Avenue East Ramps B 2 sec. C 2 sec. County Road E and Pine Tree Drive A 6 sec. A 8 sec. Pine Tree Drive and Country Financial Access A/A A/A 6 sec. Lexington Avenue N and Harriet Avenue A/A 6 sec. A/B sec. Indicates an unsignalized intersection with all-way stop control Indicates an unsignalized intersection with side-street stop conoach LOS. The delay shown represents the worst side-street approach delay.