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Chart 7 — P.M. Peak Hour Queues: Side Street Stop Sign Controlled Intersections <br />1 <br />° ; 10 <br />LE <br />a) <br />a) <br />a) <br />C� 6 <br />a) <br />aa) 4 <br />Cr) <br />_c ▪ 2 <br />L <br />rn <br />0 <br />11 <br />Hwy 10/Bowers Riverdale Riverdale Riverdale Riverdale Bowers <br />Drive/Riverdale Drive/Llama Drive/Armstrong Drive/Western Drive/Eastern Drive/Riverdale <br />Drive Street Boulevard/S Site Access Site Access Drive <br />HWY 10 Ramps <br />Existing <br />2022 No -Build 2022 Build <br />2040 No -Build 2040 Build — — — Queue = 5 <br />c. Vehicular Mitigation Analysis <br />Per the above analyses, most of the study intersections and all corridors will operate <br />acceptably throughout the study scenarios. However, the proposed side street stop <br />control intersection of Hwy 10/Riverdale Drive begins to see queues that extend <br />above five vehicles. <br />Further investigation into the queues at this intersection revealed that in the no - <br />build and build scenarios delays begin to reach excessive levels for the northbound <br />left turning movements. This movement will experience delays up to: <br />• Four minutes in the 2022 no -build scenario <br />• 21 minutes in the 2040 no -build scenario <br />• 12 minutes in the 2022 build scenario <br />• Over an hour in the 2040 build scenarios <br />Alternatives were explored to provide appropriate mitigation at this location, <br />improving the vehicle operations. Specially, mitigation was examined to help reduce <br />delays associated with the northbound left turning vehicles. Generally, the least <br />expensive alternative providing acceptable operations is recommended (i.e. stop <br />signs over a traffic signal if stop signs will be sufficient). Based on these analyses, <br />construction of the proposed Hwy 10/Riverdale Drive intersection as a 3/4-access, <br />eliminating the northbound left turning movement from the intersection is <br />recommended. <br />Traffic Impact Study 12 <br />Riverstone South Development <br />titiSpack <br />