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Table 5 <br />2040 Build Operations <br />Intersection <br />Overall LOS & Delay (sec) <br />Notes/95th Percentile Q <br />AM Peak Hour <br />PM Peak Hour <br />Variolite St NW & 173rd Ave NW/ <br />175th Ave NW <br />a (0.5)/a nbl (2.3) <br />a (0.4)/a nbl (2.3) <br />NB Q is 30 ft in AM; <br />NB Q is 31 ft in PM <br />Variolite St NW & Site Access <br />(170th Ave NW) <br />a (0.9)/a wbl (3.9) <br />a (0.8)/ a wbl (4.7) <br />WB Q is 30 ft in AM; <br />WB Q is 21 ft in PM <br />Variolite St NW & 161st Avenue <br />NW <br />a (2.1)/a eb (5.8) <br />a (1.8)/a wb (6.4) <br />EB Q is 43 ft in AM; <br />EB Q is 46 ft in PM <br />Variolite St NW & Alpine Dr NW <br />a (2.2)/a sbl (4.2) <br />a (2.0)/a sbl (5.6) <br />SBQis46ftinAM; <br />SB Q is 44 ft in PM <br />Nowthen Blvd NW & 175th <br />Avenue NE <br />a (1.3)/a ebl (6.2) <br />a (2.8)/b ebl (11.9) <br />EBL Q is 26 ft in AM; <br />EBL Q is 45 ft in PM <br />Nowthen Blvd NW & 173rd <br />Avenue NW <br />a (2.2)/a ebl(8.9)a <br />()/ <br />(3.8)/b ebl(13.6)EBL <br />()/ <br />Q is 56 ft in AM; <br />EB Q is 44 ft in PM <br />Nowthen Blvd NW & 167th <br />Avenue NW <br />a (3.8)/a wb (9.4) <br />a (4.9)/c wb (20.3) <br />EB Q is 40 ft in AM; <br />WB Q is 70 ft in PM <br />Nowthen Blvd NW & Ramsey <br />Blvd NW <br />a (5.0)/c ebl (18.1) <br />a (8.9)/e ebl (36.9) <br />EBL Q is 38 ft in AM; <br />EBL Q is 187 feet in PM <br />3. <br />1. Overall Level of Service reported from SimTraffic delay, first letter represents intersection LOS, while second letter represents worst <br />LOS of individual approach. Upper case letters indicate signalized intersection, and lower-case letters indicate unsignalized intersection. <br />2. 95th percentile queues are a result from an average of 10 SimTraffic simulations. <br />The results shown in Table 5 indicate all intersections are expected to operate at acceptable overall LOS in <br />2040 with the proposed project. Further, the results indicate all intersections will experience short to <br />moderate vehicle queues, which are typical for peak hour conditions. (Again, when the operations of the <br />intersection and critical movements are at LOS A, the random number generator can sometimes result in <br />slightly better delay or queuing results on minor movements even with higher traffic conditions.) However, <br />the eastbound approach to Nowthen Boulevard NW from Ramsey in the PM Peak hour will be at capacity, <br />and changes to the traffic control should be considered. Preliminary review of traffic signal and roundabout <br />warrants suggest this intersection will satisfy peak hour warrant in the 2040 planning horizon year. <br />Operational analysis of the potential traffic control change options indicates all movements will operate at <br />LOS B or better, with short queues. It is noted if traffic control changes occur modifications to the <br />intersection geometry will be needed. Review of minor modifications such as converting the northbound <br />by-pass lane to a dedicated left turn lane will improve safety and show a slight reduction in northbound left <br />Traffic Impact Study <br />Page 23 Sotarra - Trott Brook <br />S2 Traffic Solutions August 10, 2021 <br />