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Ms. Jessica Jagoe, Associate Planner <br />September 4, 2018 <br />Page 22 <br /> <br /> <br />As shown when comparing the AM peak hour intersection capacity analysis results in Tables 6 <br />and 8, the differences between the Caribou Coffee development scenario and the Caribou <br />Coffee plus AFSA development scenario are practically negligible. <br /> <br /> <br />Mitigation Measures <br /> <br />As mentioned, the operational performance of the I-35E Southbound Ramps/Little Canada <br />Road/Country Drive intersection system can be improved. The logical first step in attempting to <br />address potential operational issues under year 2020 conditions is to optimize traffic signal <br />timing for the anticipated future volumes. Optimization of this signal system was tested under <br />forecasted year 2020 conditions with both the Caribou Coffee store and the proposed AFSA <br />school in place using Synchro software. Results of the year 2020 intersection capacity <br />analysis presented in Table 9 indicate that the I-35E Southbound Ramps/Little Canada <br />Road/Country Drive study intersection could be expected to operate near the LOS C/D <br />threshold overall with signal optimization improvements. The results indicated that potential <br />side-street delay and queuing issues on the southbound Country Drive approach can be <br />addressed without additional signal phasing and/or roadway geometric improvements. No <br />significant impacts to other study intersection approaches were observed when the I-35E <br />Southbound Ramps/Little Canada Road/Country Drive intersection was optimized. Detailed <br />operations and queuing analysis results are presented in the Addendum to this memorandum. <br /> <br />TABLE 9 <br />INTERSECTION OPERATIONS WITH SIGNAL OPTIMIZATION <br />I-35E Southbound Ramps/Little Canada Road/Country Drive Intersection <br /> AM Peak Hour PM Peak Hour <br /> Current Optimized Current Optimized <br /> Overall <br />LOS/ <br /> Delay <br />Worst <br />LOS/ <br />Delay <br />Overall <br />LOS/ <br /> Delay <br />Worst <br />LOS/ <br />Delay <br />Overall <br />LOS/ <br /> Delay <br />Worst <br />LOS/ <br />Delay <br />Overall <br />LOS/ <br /> Delay <br />Worst <br />LOS/ <br />Delay <br />2018 Existing <br />(No Caribou/ <br />No AFSA <br />School) <br />C / 30.5 D / 79.8 C / 23.4 D / 38.7 D / 36.6 E / 70.0 D / 37.2 D / 46.9 <br />Forecast 2020 <br />with Caribou <br />D / 40.6 F / 147.3 C / 26.5 D / 45.2 D / 39.1 F / 87.6 D / 37.7 E / 71.9 <br />Forecast 2020 <br />with Caribou <br />and AFSA <br />School <br />D / 45.9 F / 156.7 C / 30.2 D / 43.7 D / 39.1 F / 87.6 D / 37.7 E / 71.9 <br /> Same “Optimization” as the Build Caribou (without AFSA School) scenario. <br /> <br />Source: Biko Associates, Inc. <br /> <br /> <br /> <br /> <br />D / 39.1