02-19-2008 Agenda
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<br />- 4- <br /> <br />YEAR 2015 AND 2025 ROUNDABOUT ANALYSIS <br /> <br />The roundabout analysis looks primarily at the traffic volume at each of the four intersection <br />approaches. The entry volume at each approach is graphed versus the circulating volume at <br />the same approach. These results are then compared to the volume to capacity threshold for a <br />single or double-lane roundabout entrance to determine whether or not the study intersection <br />will operate under capacity (Chart I). <br /> <br />Chart 1 <br />Roundabout Capacity Limits <br /> <br />3000 <br /> <br />500 <br /> <br /> <br />2500 <br /> <br />:2 <br />- <br />.s::: <br />Q) <br />..::. 2000 <br />:= <br />o <br />u: <br />~ 1500 <br />- <br />" <br />w <br />E <br />::l <br />E 1000 <br />';c <br />'" <br />:;; <br /> <br />500 1000 1500 2000 <br />Circulatory Flow (veh/h) <br />,- Urban & Rural Single-Lane _ _ - Urban Compact Roundabouts <br /> <br />2500 <br /> <br />3000 <br /> <br />3500 <br /> <br />- Double-Lane Roundabout <br /> <br />An analysis at the intersection of CR 17/52nd Avenue was performed during the a.m. and <br />p.m. peak hour for traffic volumes in years 2015 and 2025. The following graphs represent <br />the roundabout analysis results at each intersection. <br />
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