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'p'v°pose( <br />CMF = <br />(V 2existing <br />R exist <br />0.01 Xpropo.sed <br />Vpropsed = proposed posted speed limit (mph) <br />Rproposed = proposed horizontal curve radius (ft) <br />Xproposed= proposed curve superelevation (degrees) <br />Vexusi;rog = existing speed limit (mph) <br />Rex;s,u,,g = existing horizontal curve radius (ft) <br />X2xosq,;,,g = existing curve superelevation (degrees) <br />$ <br />C1\1Fs are used to estimate safety performance after implementation of an improvement by <br />multiplying the C1\1F with the historical crash rate to compute the estimated future crash rate. <br />rit Li re iiil"' p t.,;Oity Ana011ysis, <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 />°II°ablle:14„ Year 2 4rS IRS urna Ipeiraatiiorn An�allysiis <br />Intersecting Roadway <br />167th Ave <br />Ramsey Blvd (CSAH 56) <br />Sunwood Dr <br />AM Peak PM Peak <br />LOS Delay (sec.) LOS Delay (sec.) <br />A ti A 1I..0 <br />A ti A 7 <br />A I A <br />Operations analysis results for future year conditions indicate the roundabout control alternatives <br />operate at acceptable levels of service. <br />25 <br />