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Trott Brook Crossing EAW Traffic Study Review January 6, 2022 <br />• Nowthen Boulevard NW / 167th Avenue NW <br />o The side -street delay in the westbound direction is nine (9) seconds for the a.m. peak and 48 <br />seconds for the p.m. peak hour. The 95th percentile queues in the westbound direction are <br />expected to be approximately 50 feet during the a.m. peak hour and 160 feet during the p.m. <br />peak hour. The 95th percentile queues in the eastbound direction are expected to be <br />approximately 60 feet during the a.m. peak hour and 75 feet during the p.m. peak hour. <br />o Side -street delay is expected to increase by approximately three (3) seconds per vehicle during <br />the a.m. peak and 35 seconds per vehicle during the p.m. peak as compared to existing <br />conditions. <br />The remaining intersections had minimal changes to their traffic operations. Based on the year 2040 <br />no build condition operations analysis, no geometric or traffic control changes are needed to <br />accommodate the background growth from an intersection capacity perspective. <br />Future Build Conditions <br />To determine how the study intersections and site access will operate under year 2026 and 2040 build <br />conditions, an intersection capacity analysis was completed using Synchro/SimTraffic software. The <br />build conditions analyzed the proposed Trott Brook Crossing development and the adjacent North <br />Brook Meadows development. <br />Year 2026 Build Conditions <br />Results of the year 2026 build conditions intersection capacity analysis shown in Table 7 indicates that <br />the study intersections are expected to continue operating at an acceptable overall LOS B or better <br />during the a.m. and p.m. peak hours with the proposed roadway geometry and traffic controls. <br />Table 7. Year 2026 Build Conditions Peak Hour Capacity Analysis <br />Intersection <br />A.M. Peak Hour <br />P.M. Peak Hour <br />LOS <br />Delay <br />LOS <br />Delay <br />Variolite Street NW / Alpine Drive (1) <br />A/A <br />5 sec. <br />A/A <br />4 sec. <br />Variolite Street NW / 161st Avenue NW (1) <br />A/A <br />4 sec. <br />A/A <br />6 sec. <br />Variolite Street NW / Trott Brook Crossing <br />A/A <br />4 sec. <br />A/A <br />6 sec. <br />Variolite Street NW / 173rd Avenue NW (1) <br />A/A <br />2 sec. <br />A/A <br />3 sec. <br />Nowthen Boulevard NW / Ramsey Boulevard NW <br />A/B <br />11 sec. <br />B/E <br />39 sec. <br />Nowthen Boulevard NW / 167th Avenue NW (1) <br />A/A <br />8 sec. <br />A/D <br />29 sec. <br />Nowthen Boulevard NW / 173rd Avenue NW (1) <br />A/A <br />7 sec. <br />A/A <br />6 sec. <br />Nowthen Boulevard NW / 175th Avenue NW (1) <br />A/A <br />5 sec. <br />A/A <br />9 sec. <br />175th Avenue NW/ North Brook Meadow (1) <br />A/A <br />3 sec. <br />A/A <br />5 sec. <br />(1) Indicates an unsignalized intersection with side -street stop control, where the overall LOS is shown followed by the worst approach <br />LOS. The delay shown represents the worst side -street approach delay. <br />Page 16 <br />