Agenda - Planning Commission - 06/23/2022

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Josh Nyquist,Executive Director of Building Operations May 26,2022 PACT Charter School I Traffic Impact Study Page 19 Combined Sunday A.M.St. Katharine Drexel Church Development Conditions The Sunday a.m. church related existing geometrics, traffic control, and traffic volumes and traffic operations analysis related to the adjacent future proposed St. Katharine Drexel Church have been combined with year 2028 No-Build and Build scenario Sunday a.m. church peak hour (9:30-10:30 a.m.) traffic operations analyses. Results of the combined Sunday a.m. church peak hour traffic operations analysis (shown in Table 7) indicate that all study intersections are expected to operate at an acceptable overall LOS A during the peak hour under existing traffic control and intersection geometrics. No significant queuing or delay issues were identified in this analysis. Table 8. Sunday A.M.St. Katharine Drexel Church Combined Conditions Peak Hour Traffic Analysis Existing Sunday 2028 No-Build Sunday 2028 Build Sunday Study Intersection A.M. Peak Hour A.M. Peak Hour A.M. Peak Hour LOS Delay Queue LOS Delay Queue LOS Delay Queue Variolite Street/173rd Avenue(1) A/A 9 sec. NB/1 A/A 9 sec. NB/ A/A 9 sec. NB/1 Variolite Street/161st Avenue(1) A/A 10 sec. WB/1 A/A 10 sec. WB/1 A/B 11 sec. WB/1 Variolite Street/Alpine Drive(1) A/A 10 sec. SB/1 A/A 10 sec. SB/1 A/A 10 sec. SB/1 Armstrong Boulevard/161st Avenue(1) A/B 12 sec. WB/1 A/B 12 sec. WB/1 A/B 12 sec. WB/1 Armstrong Boulevard/Alpine Drive(1) A/B 14 sec. WB/1 A/B 15 sec. WB/1 A/C 16 sec. WB/1 Armstrong Boulevard/Alpine Drive(3) A/A 5 sec. NB/1 A/A 5 sec. NB/1 A/A 5 sec. N/1 161st Ave/Primary Site (East)Access(1) A/A 10 sec. SB/1 161st Ave/Secondary Site(West)Access(1) - - - - - - - - - Ramsey Boulevard/Alpine Drive(2) A/A 10 sec. SB/1 A/A 10 sec. NB/1 A/A 10 sec. NB/1 175th Avenue/Nowthen Boulevard (1) A/B 11 sec. EB/1 A/B 11 sec. EB/1 A/B 11 sec. EB/1 (1) Indicates a side-street stop-controlled intersection,where the overall LOS is shown followed by the worst approach LOS.The delay shown represents the worst side-street approach average delay per vehicle.The queue shown is the 95th percentile queue(in vehicles)for the worst approach at the intersection. The 95th percentile queues shown in red bold font spill back to and beyond the adjacent upstream intersection. (2) Indicates an all-way stop-controlled intersection,where the overall LOS and average delay per vehicle are shown.The queue shown is the 95th percentile queue(in vehicles)for the worst side-street approach at the intersection.The 95th percentile queues shown in red bold font spill back to and beyond the adjacent upstream intersection. (3) Indicates an improvement to provide a single-lane roundabout intersection,where the overall LOS and average delay per vehicle are shown.The queue shown is the 95th percentile queue(in vehicles)for the worst side-street approach at the intersection.The 95th percentile queues shown in red bold font spill back to and beyond the adjacent upstream intersection. Proposed Site Access/Circulation Review A review of the proposed PACT Charter School development site plan (see Figure 4) was completed to identify issues specific to the site plan configuration, site access and circulation and recommend potential improvements if needed. Vehicular access to/from the proposed site is planned at two locations on 161st Street: a primary (east) site access approximately 600 feet west of Variolite Street and a secondary (west) site access approximately 1,150 feet west of Variolite Street.