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 18 Development Build Conditions Intersection Traffic Operations/Capacity Analysis The year 2028 Build Development Conditions intersection traffic operations/capacity analysis was completed to determine future traffic operations and development-generated traffic impacts. The capacity analysis was completed for the a.m., dismissal and p.m. peak hours at the study intersections using Synchro/SimTraffic model. Results of the Development Build Conditions traffic operations analysis are shown in Table 7. Year 2028 Weekday Development Build Conditions Results of the year 2028 Build Conditions intersection capacity analysis shown in Table 7,indicate that all study intersections are expected to continue to operate at an acceptable overall LOS B or better during the peak hours under existing traffic control and intersection geometrics. No significant queuing or delay issues were identified,except for the Armstrong Boulevard/Alpine Drive intersection where the westbound approach would continue to operate at a LOS F during the p.m. peak hour (note: no PACT Charter School traffic was assigned to this westbound Alpine Drive approach). The future conversion of Armstrong Boulevard/Alpine Drive to a single-lane roundabout will improve the westbound approach and all approaches will operate at a LOS A during the peak hours. Table 7. Year 2028 Weekday Build Conditions Peak Hour Traffic Operations/Capacity Analysis A.M. Peak Hour Dismissal Peak Hour P.M. Peak Hour Study Intersection 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/1 A/A 10 sec. NB/1 Variolite Street/161st Avenue(1) A/C 16 sec. WB/1 A/B 12 sec. EB/2 A/B 11 sec. EB/1 Variolite Street/Alpine Drive(1) A/B 13 sec. SB/1 A/B 11 see. SB/2 A/B 11 sec. SB/1 Armstrong Boulevard/161st Avenue(1) A/C 16 sec. WB/1 A/C 17 sec. WB/2 A/C 17 sec. WB/1 Armstrong Boulevard/Alpine Drive(1) A/n 29 sec. WB/2 A/C 22 sec. WB/2 A/F 77 sec. WB/6 Armstrong Boulevard/Alpine Drive(3) A/A 8 sec. SB/2 A/A 6 sec. NB/2 A/A 10 sec. NB/4 161st Ave/Primary(East)Site Access(1) A/b 13 sec. SB/2 A/B 12 sec. SB/1 A/A 10 sec. SB/1 161st Ave/Secondary(West)Site Access(1) A/B 11 sec. SB/1 A/B 11 sec. SB/1 A/A 10 sec. SB/1 Ramsey Boulevard/Alpine Drive(2) B/B 14 sec. SB/2 B/B 14 sec. NB/3 B/B 14 sec. NB/3 175th Avenue/Nowthen Boulevard (1) A/B 15 sec. EB/1 A/B 14 sec. EB/1 A/B 15 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.