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Scenario 2 <br />Based on the analysis of future traffic volumes for Scenario 2, both intersections <br />on TH 10 / 169 at 171St Avenue and Twin Lakes Parkway will begin to <br />experience delays in 2013 for traffic on TH 10 / 169 during both the AM and PM <br />peak hours, especially for westbound TH 10 / 169 during the PM peak hour and <br />northbound Twin Lakes Parkway during the AM peak hour. By adding the third <br />lane on TH 10 /169 the analysis indicates that the intersections would again <br />begin to breakdown in 2019 during the PM peak hour. <br />TH 10 / 169 Interchange -The 2031 build conditions were analyzed assuming a <br />standard diamond interchange at TH 10 / 169 and Twin Lakes Parkway with the <br />future roadway network shown in Figure 21-4, and assuming full build of the <br />development area. The results of the analysis indicate that with the standard <br />diamond interchange the amount of traffic turning at the interchange ramps is <br />extremely high and cannot be accommodated with this type of interchange. The <br />overall LOS at both ramp intersections is LOS C / B in the AM peak hour and LOS <br />D / F in the PM peak hour. Assuming an interchange with additional capacity <br />such as a single point or diverging diamond, the overall LOS could be improved <br />to a LOS D / E, with some movements still at LOS F. <br />Twin Lakes Parkway at 168th Avenue -This intersection would experience <br />delays for both the northbound and westbound approaches during AM and PM <br />peak hours. The overall LOS at this intersection is projected to be F during both <br />the AM and PM peak hours. If a roundabout or traffic signal is installed the <br />operations would improve to an LOS C. <br />Twin Lakes Parkway at Wilson Street -This intersection is located on the south <br />side of TH 10 / 169. The delays at this intersection are strictly the result of the <br />interchange operation and would be eliminated with a higher capacity <br />interchange. <br />All other study area intersections would be operating at LOS C or better during <br />both the AM and PM peak hours. Table 21-6 shows the results of the 2031 <br />Scenario 2 analysis. <br />City of Elk River <br />Draft Alternative Urban Areawide Review <br />July 2011 <br />Page 66 of 84 <br />