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12-21-2020-WS
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12-21-2020-WS
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<br /> <br />Feasibility Report Page 6 <br />Snelling Avenue North and County Road E - Street and Utility Improvements <br />City Project Number PW 20-0100 DRAFT <br />2.3 Intersection Conditions <br />In April 2018, the City Council entered into a cooperative agreement with Ramsey County <br />to conduct a traffic study and Intersection Control Evaluation (ICE) for the intersection of <br />Snelling Avenue North and County Road E. The ICE study was completed in November <br />2018. A copy of the report is provided in Appendix B. <br />The purpose of the ICE report was to evaluate the existing (2018) and future (2038) traffic <br />control layout for the intersection of County Road E and Snelling Avenue North and <br />recommend potential improvements. The report identifies two key points related to the <br />existing intersection function. <br />1. The County Road E corridor is projected to see an increase in traffic over the coming <br />years with the Bethel University Expansion. <br />2. MnDOT’s Crash Mapping Analysis Tool (MnCMAT) database indicates there have been <br />9 crashes at the intersection between January 2013 and December 2015. Existing crash <br />patterns show that the intersection experiences an extremely high rate of 0.68 crashes <br />per million entering vehicles compared to the average rate of 0.34 for all-way stop <br />intersections. The crash rate is higher than the critical rate of 0.65 and the severity rate <br />of 0.76 is higher than the Statewide average severity rate of 0.5. <br />The intersection was simulated with a traffic model for both the AM and PM peak traffic <br />hours using existing (2018) traffic volume data as described in the ICE report. The traffic <br />operations analysis showed that the intersection currently operates at an acceptable Level of <br />Service (LOS) “A” during the AM peak hour and LOS “B” during the PM peak hour. The <br />report concluded “The analysis results indicate there are not major queuing issues currently <br />at the intersection. However, based on field observation during the peak hours, the <br />intersection seems to perform far poorer tha[n] what the analysis is indicating.” <br />The study then continued with further analysis of the intersection, substituting traffic volume <br />data from the 2013 Bethel University Expansion Traffic Stud y in lieu of existing 2018 traffic <br />volume data. This alternative analysis assumed traffic volumes of approximately 30 percent <br />more than measured volumes and identified that the intersection is forecasted to fail during <br />the PM peak hour under current conditions. The study further predicted that the intersection <br />would continue to operate poorly during the PM peak hour under projected increases in <br />traffic volume in the year 2038. <br /> <br />The installation of traffic signals are guided by a series of standards, or warrants, that define <br />the minimum conditions under which installing a traffic signal could be justified. The ICE <br />report reviewed existing traffic characteristics and determined that traffic signal warrants are <br />not currently met for the intersection of Snelling Avenue North and County Road E. <br />Installation of a signal would not be justified at this time. <br /> <br />The traffic study further reviewed the intersection to determine if warrants are met for <br />installation of a single lane roundabout. Although no formal traffic warrants for roundabouts <br />currently exist, the MnDOT Intersection Control Evaluation Manual states that if a traffic <br />signal or an all-way stop warrant is met, a roundabout should also be considered as a traffic <br />control device. All-way stop warrants are currently met for this intersection, therefore the
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