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• <br /> Everett Safe Streets Traffic Impact Analysis <br /> Table 1: Level of Service Criteria for Intersections <br /> Intersection Control Delay <br /> Level of 1 Expected (Seconds per Vehicle) <br /> Service Delay Unsignalized Signalized <br /> Intersections Intersections <br /> A Little/No Delay <10 <10 <br /> B Short Delays >10 and<15 >10 and<20 <br /> C Average Delays >15 and<25 >20 and<35 <br /> D Long Delays >25 and<35 >35 and<55 <br /> E Very Long Delays >35 and<50 >55 and<80 <br /> F Extreme Delays2 >50 >80 <br /> The level of service analysis has been performed using the Synchro 9.1, Build 907 software. The <br /> acceptable level of service at City of Everett intersections is LOS D. <br /> 3. TRIP GENERATION <br /> Trip generation estimates for the Everett Safe Streets development are based on a count at the 71- <br /> unit Patrick Place site in the City of Seattle since there is not a similar use in the Institute of <br /> Transportation Engineer (ITE) Trip Generation Manual, 9th Edition. Patrick Place is similar in <br /> nature, both have a similar number of units(Patrick Place has 71 units and the Everett site has 70 <br /> units) and surrounding features. Patrick Place is located along Aurora Avenue N with several <br /> transit options and there are 10 Everett Transit/Community Transit stops within 0.50 miles of the <br /> Everett site. Both sites are urban in nature with pedestrian facilities, including curb, gutter and <br /> sidewalk in mixed-use neighborhoods. The Seattle versus Everett location is not anticipated to <br /> significantly affect the trip generation since there are several commercial uses,including a grocery <br /> store and pharmacy, surrounding the Everett site. <br /> 1 Source: Highway Capacity Manual 2010. <br /> LOS A: Free-flow traffic conditions,with minimal delay to stopped vehicles(no vehicle is delayed longer <br /> than one cycle at signalized intersection). <br /> LOS B: Generally stable traffic flow conditions. <br /> LOS C: Occasional back-ups may develop,but delay to vehicles is short term and still tolerable. <br /> LOS D: During short periods of the peak hour, delays to approaching vehicles may be substantial but are <br /> tolerable during times of less demand(i.e.vehicles delayed one cycle or less at signal). <br /> LOS E: Intersections operate at or near capacity,with long queues developing on all approaches and long <br /> delays. <br /> LOS F: Jammed conditions on all approaches with excessively long delays and vehicles unable to move at <br /> times. <br /> 2 When demand volume exceeds the capacity of the lane, extreme delays will be encountered with queuing which <br /> may cause severe congestion affecting other traffic movements in the intersection. <br /> Gibson Traffic Consultants, Inc. October 2016 <br /> info@gibsontraffic.com 3 GTC#16-253 <br />