09-12-2018 Council Packet - Laserfiche WebLink

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Ms. Jessica Jagoe, Associate Planner September 4, 2018 Page 2 Summary of Conclusions The traffic study’s conclusions are summarized below. Off-Site Impacts: 1. The analysis of intersection operations at the Little Canada Road/Country Drive intersection required a full system analysis two intersections. The traffic signal system implemented by MnDOT is a synchronized/coordinated system that controls traffic flow for all six legs of the I-35E Southbound Ramps/Little Canada Road/Country Drive intersection, as well as the intersections formed by I-35E Northbound Ramps/Little Canada Road and Centerville Road/Little Canada Road. The system’s split interval signal phasing minimizes potential vehicle conflicts by allowing: a) the eastbound and westbound Little Canada Road approaches to be served simultaneously and b) the southbound Country Drive approach and the I-35E Southbound Exit Ramp approach to be served separately. 2. The analysis showed: - Existing 2018 operations for the I-35E Southbound Ramps/Little Canada Road/Country Drive signals in the system are at overall Level of Service (LOS) C during the AM peak hour and LOS D in the PM peak hour. The southbound Country Drive and Southbound I-35E Exit Ramp approaches both operate in the LOS D to LOS E range during the AM and PM peak hours. While LOS E can be cause for concern, as it indicates a situation where an intersection approach is nearing its capacity, LOS E is not concerning in this case because of the intersection’s atypical geometry. No significant queuing issues were observed in the field or indicated in the computerized traffic model that was used to conduct the analysis. - Forecast Year 2020 operations were run to include traffic that will be generated by a new Caribou Coffee shop on the southwest corner of the Little Canada Road/Country Drive intersection. Using traffic counts taken by Biko Associates (on August 22, 2018) and adding traffic that will be generated by the coffee shop, as outlined in the Caribou Coffee Traffic Study, the analysis showed that the I-35E Southbound Ramps/Little Canada Road/Country Drive system of intersections will operate at overall LOS D during the AM and PM peak hours. The analysis further showed that the southbound Country Drive approach will operate at LOS F in the AM and PM peak hours. These results are closely similar to those reported by Alliant Engineering in the Caribou Coffee Traffic Study (April 11, 2018)