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Copart USA Traffic Impact Study <br />Elk River, MN <br />Table 1 - Existing Peak Hour Levels of Service <br />1/14/2020 <br />Intersection <br />Lane Assignment <br />Intersection <br />Traffic <br />Control <br />Existing Conditions <br />AM PEAK <br />PM PEAK <br />Intersection <br />Delay and <br />LOS <br />Level of <br />Service <br />Approach <br />Delay <br />(sec) <br />95th%ile <br />Queue (ft) <br />Intersection <br />Delay and <br />LOS <br />Level of <br />Service <br />Approach <br />Delay <br />(sec) <br />95th%ile <br />Queue (ft) <br />Jarvis St & 161st <br />Avew NW <br />EB Right <br />N <br />0.5sec/veh = <br />LOS A <br />- <br />0.5sec/veh = <br />LOS A <br />A <br />2.3 <br />14 <br />NBThru <br />A <br />0.7 <br />n.a. <br />A <br />0.4 <br />n.a. <br />SIB Thru <br />A <br />0.2 <br />n.a. <br />A <br />0.2 <br />n.a. <br />Cleveland St& <br />Eastbound TH 10 <br />EB Left <br />N <br />1.3sec/veh= <br />LOS A <br />A <br />0.3 <br />n.a. <br />1.1sec/veh= <br />LOS A <br />A <br />0.2 <br />n.a. <br />EB Thru <br />A <br />1.1 <br />n.a. <br />A <br />0.8 <br />n.a. <br />EB Right <br />A <br />0.1 <br />n.a. <br />A <br />0.0 <br />n.a. <br />NBThru <br />C <br />20.6 <br />8 <br />B <br />13.9 <br />40 <br />NB Right <br />A <br />4.5 <br />8 <br />A <br />7.5 <br />40 <br />SIB Left <br />C <br />20.8 <br />40 <br />A <br />9.6 <br />33 <br />SIB Thru <br />C <br />18.1 <br />40 <br />A <br />3.9 <br />33 <br />SIB Right <br />- <br />0.0 <br />n.a. <br />- <br />0.0 <br />n.a. <br />Westbound 10& <br />Jarvis Stt <br />WB Left <br />N <br />1.1sOSA veh= <br />LOS <br />A <br />0.1 <br />n.a. <br />LOS A 2.6sec/veh=ED <br />A <br />0.0 <br />n.a. <br />WB Thru <br />A <br />0.8 <br />n.a. <br />A <br />1.4 <br />n.a. <br />WB Right <br />A <br />0.0 <br />n.a. <br />A <br />0.1 <br />n.a. <br />NB Left <br />A <br />4.1 <br />40 <br />34.9 <br />64 <br />NBThru <br />A <br />41 <br />40 <br />41.9 <br />64 <br />SBThru <br />A <br />6.9 <br />36 <br />36.7 <br />66 <br />SIBRight <br />A <br />3.6 <br />36 <br />24.6 <br />66 <br />Source: Westwood Professional Services, 2020 <br />C. NO -BUILD SCENARIO <br />To measure the traffic impacts that could result from the Copart development, Westwood first <br />tested the performance and operation of the study intersections with only the projected <br />background traffic volumes for the future design year. For this analysis, it was assumed that <br />there would be one design year (2023), which would correspond to one year after anticipated <br />full build out of the Copart development, if approved. <br />According to City of Elk River staff, the annual growth rate for the city is assumed to be 1.2%.9 <br />Westwood applied this annual growth rate to the existing volumes in the study area to estimate <br />year 2023 background peak hour traffic volumes. Figures 4 illustrates the projected 2023 No - <br />Build Turning Movement Volumes for the study area. <br />Westwood then created a Synch ro/Si mTraffic model using these projected volumes. Table 2 <br />shows the results of the 2023 No -Build condition. The intersection of TH 10 & Jarvis was <br />assumed to be unsignalized. As with the Existing peak hour analysis, there are acceptable levels <br />of service at each of the study intersections. Some individual northbound and southbound <br />approach movements to TH 10 continued to show LOS-E conditions and queueing up to 72 feet <br />(approaching four car lengths). <br />9 Comment made by City of Elk River staff during meeting at City Hall, January 2, 2020. <br />8 Westwood <br />