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Traffic Study Lexington Avenue Reconstruction Alliant No. 118-0186.0 17 April 18, 2019 LOS A indicates the best traffic operation, with vehicles experiencing minimal delays. LOS F indicates an intersection where demand exceeds capacity, or a breakdown of traffic flow. The LOS D/E boundary for overall operations is often used as the indicator of congestion in an urban area. For side-street stop-controlled intersections, a key measure of operational effectiveness is the side-street LOS. Long delays and poor LOS can occur on side-street approaches even if the overall intersection is functioning well, making side-street LOS a valuable design criterion. After LOS, the second component of the operations analysis is a study of vehicular queuing, or the lineup of vehicles waiting to pass through an intersection. An intersection can operate with an acceptable LOS, but if queues from the intersection block entrances to turn lanes or adjacent driveways, unsafe operating conditions could result. The 95th percentile queue, or the length of queue with only a five (5) percent probability of being exceeded during an analysis period, is considered the standard for design purposes. It should be noted that, after consultation with Ramsey County staff, an annual background growth rate of 0.5 percent was applied to existing traffic volumes to provide a conservative estimate of future year 2020 conditions. Results of the existing and year 2020 no build traffic operations analyses, presented in Table 3 and Table 4 respectively, indicate that all study intersections operate at overall LOS D or better during the a.m., midday, and p.m. peak hours. Detailed operations and queuing analysis results are presented in Appendix A. Table 3. Existing Operations Analysis Summary Key conclusions of the existing traffic operations analysis include the following: x Red Fox Road: Under midday and p.m. peak hour traffic volumes, southbound left-turn queuing can occasionally extend beyond available turn lane storage and into the I-694 EB Ramp Terminal intersection to the north. Access to the northbound right-turn lane at the adjacent I-694 EB Ramp Terminal intersection can occasionally be blocked by northbound through queues. Both preceding issues are a consequence of limited spacing between the Red Fox Road and I-694 EB Ramp Terminal intersections. The westbound right-turn movement at Red Fox Road also sees queues exceed provided turn lane storage. Lexington Avenue & Red Fox Road B / C 11.5 / 29.6 C / C 22.7 / 28.9 C / D 29.9 / 39.8 Lexington Avenue & Lexington Station A / A 1.4 / 7.8 C / F 20.6 / 208.7 A / F 8.9 / 109.9 Lexington Avenue & Target South A / B 0.6 / 12.5 B / F 10.2 / 93.9 A / F 4.6 / 65.2 Lexington Avenue & Enterprise/Big O Tires/Arby's A / B 0.7 / 11.5 A / E 2.5 / 48.5 A / C 1.4 / 15.9 Lexington Avenue & Grey Fox Road A / C 6.4 / 31.4 A / C 9.4 / 26.9 B / C 14.1 / 30.9 Lexington Avenue & Shannon Square A / A 2.5 / 8.0 A / C 4.4 / 16.2 A / C 5.8 / 20.7 Lexington Avenue & CR E C / C 21.4 / 32.7 C / C 21.3 / 31.0 D / D 40.9 / 53.2 Intersection AM Peak Hour PM Peak Hour LOS Delay (s)LOS Delay (s) MID Peak Hour LOS Delay (s) Overall Intersection LOS / Worst Approach LOS Overall Intersection Delay / Worst Approach Delay