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2022-05-25 CC Packet
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2022-05-25 CC Packet
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Project BanjoTraffic Study Regional Analysis AddendumApril 22, 2022 <br />Page 23 <br />th <br />7)Long-Term: Southbound Left-Turn Lanesalong 20 <br />Avenue the capacity analysis does not <br />th <br />indicate a need for southbound left-turn lanes along 20Avenue at Commerce Drive or Fairview <br />st <br />Steet since mostsite generated trips will use 21 <br />Avenue to access I-35E. However, coordination <br />with Anoka County should occur to review the analysis and study findingsand determine if these <br />turn lanes should be incorporated from a safetyand reduced conflict perspective. <br />TH <br />20AVENUE TURN LANE SENSITIVITY TEST <br />Based on discussion with project representatives, there were concerns withbusiness impacts <br />st <br />associated with potential infrastructure and access changes along 21 <br />Avenue south of Main Street; <br />queuingand turn lane storagewere also noted as a concern. Although the capacity analysis did not <br />indicate any major issues, an additional sensitivity test was conducted to understand how changes in <br />development routing could impact infrastructure needs. Since the proposed development has a <br />significant amount of control over their employee and van routing, thissensitivity testwas conducted <br />th <br />assuming proposed development related traffic was geo-coded/routed via 20Avenue to access the <br />st <br />site, as opposed to 21Avenue. The analysis focused on the 2040 Build Peak Season during the p.m. <br />peak hour, which represents the highest traffic volume scenario evaluated. <br />thst <br />The change in routingshifts approximately 300 p.m. peak hour vehicles to 20 <br />Avenue from 21 <br />Avenue (i.e., 200 inbound and 100 outbound), via Main Street. This shift also adds about100 <br />th <br />southbound left-turning vehicles along 20 <br />Avenue at Commerce Drive and Fairview Streets, <br />respectively(assuming both Commerce Drive and Fairview Streets were allowed to be usedunder a <br />geo-coded scenario). Although the capacity analysis shown in Table 8doesnot indicate any capacity <br />issues from a level of services perspective, introducing 100-plus peak hour left-turning movements <br />th <br />would warrant constructing southbound left-turn lanes along 20Avenue at both Commerce Drive and <br />Fairview Street(depending on the geo-coded routing desired). The specific configurationwould need <br />to be further evaluated and include other considerations(i.e., road realignmentsand pedcrossings). <br />Table 8 2040Build Peak Season Sensitivity Test <br />2040 Build Peak Season - PM Peak Hour <br />Traffic <br />Level of Service (Delay) <br />Intersection <br />Control <br />Original RoutingGeo-Coded Routing <br />th <br />20Avenue / Main StreetSIGNALC (21sec)C (25sec) <br />th <br />20Avenue / Commerce DriveSSSA / B (13 sec)A / B (14 sec) <br />th <br />20Avenue / Fairview StreetSSSA / B (14 sec)A / C (15 sec) <br />st <br />21Avenue / Main StreetSIGNALC (27sec)C (25 sec) <br />st <br />21Avenue / Commerce DriveSSSA / B (13 sec)A / B (10 sec) <br />st <br />Notethat the queueing issues at the 21Avenue / Main Street intersection are expected to continue, <br />regardless of theproposed development traffic rerouting (see Table 7sensitivity test). The queues <br />are reduced from the 2040 Build Peak Season analysis butare still expected to extend beyond the <br />th <br />gas station access as previously noted. The westbound left-turn lane at the 20Avenue/ Main Street <br />intersection can accommodate the shift in volumes, but once again, the signal timing would need to be <br />optimized. Therefore, based on this sensitivity test, the geo-controlling of employees and/or vans of <br />the proposed development is a tool that could be leveraged to help mitigate issues, but is not <br />considered a requirement to ensure safe and efficient transportation conditions in the area. <br /> <br />
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