6.9. SR 09-06-2011 - Laserfiche WebLink

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Scenario 3 Based on the analysis of future traffic volumes for Scenario 3 adding a third lane on TH 10 / 169 could delay the need for an interchange by approximately four years. TH 10 ,/ 169 Interchange - The fi,1_l b>>i1_d conditions were analyzed assuming a standard diamond interchange at TH 10 / 169 and Twin Lakes Parkway with the future roadway network shown in Figure 21- 4, and assuming full build of the development area. The results of the analysis indicate that with the standard diamond interchange the amount of traffic turning at the interchange ramps is extremely high and cannot be accommodated with this type of interchange. The overall LOS at both ramp intersections is LOS F in both the AM and PM peak hours. Assuming an interchange with additional capacity such as a single point or diverging diamond, the overall LOS could be improved to an overall LOS E with some movements still at LOS F. Twin Lakes Parkway at 168th Avenue -This intersection would experience delays for both the northbound and westbound approaches during AM and PM peak hours. The overall LOS at this intersection is projected to be F during both the AM and PM ' peak hours. If a roundabout or traffic signal is installed the operations would improve to an LOS C. ~, Twin Lakes Parkway at Wilson Street -This intersection is located on the south side of TH 10 / 169. The delays at this intersection are strictly the result of the interchange operation and would be eliminated with a higher capacity interchange. St Twin Lakes Parkway at 171 Lane -The eastbound and westbound minor street approaches will experience some delays during the PM peak hour. However, the overall intersection LOS is still at a B. All other study area intersections would be operating at LOS C or better during both ' the AM and PM peak hours. Table 21- 23 shows the results of the Full Development / Scenario 3 analysis. n ' City of Elk River Draft Alternative Urban Areawide Review August 2011 Page 74 of 90