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V 2 proposed <br /> 4.101� (1S *R — 0.01�X proposed <br /> e proposed <br /> CMF = V2 <br /> 4.101� existing _ 0.01*X <br /> e <br /> is *Rexisting existing <br /> Vproposed= proposed posted speed limit(mph) <br /> Rproposed= proposed horizontal curve radius (ft) <br /> Xproposed= proposed curve superelevation (degrees) <br /> Vexisti„g=existing speed limit (mph) <br /> Rexisting= existing horizontal curve radius (ft) <br /> xemsting=existing curve superelevation (degrees) <br /> CMFs are used to estimate safety performance after implementation of an improvement by <br /> multiplying the CMF with the historical crash rate to compute the estimated future crash rate. <br /> Future Year Capacity Analysis <br /> A year 2040 intersection capacity analysis was completed to evaluate how the study intersections are <br /> expected to operate in the future when the roundabout concepts are implemented. The operational <br /> analysis for the roundabout concepts was performed using RODEL. RODEL is a software program <br /> that is based on existing roundabout operational research and uses an empirical formula method to <br /> determine roundabout delay based on geometric features and traffic flows. RODEL results for a <br /> Confidence Level (CL) of 50 percent were determined,which is typically used for roundabout analysis <br /> and is considered comparable to other analysis software. The results of the roundabout operational <br /> analysis for Year 2040 forecast conditions is shown in Table 14. For the roundabout operational <br /> analysis, all RODEL models were built as the roundabouts were designed in the intersection <br /> improvement concepts shown in Figure 5 to Figure 10. <br /> Table 14:Year 2040 Roundabout Operations Analysis <br /> AM Peak PM Peak <br /> Intersecting Roadway <br /> LOS Delay(sec.) LOS Delay(sec.) <br /> 167th Ave <br /> Ramsey Blvd(CSAH 56) A <br /> Sunwood Dr A <br /> Operations analysis results for future year conditions indicate the roundabout control alternatives <br /> operate at acceptable levels of service. <br /> 25 <br />