2007-02-27_PWETC_AgendaPacket - Laserfiche WebLink

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Debra Bloom, Assistant Public Works Director/City Engineer City of Roseville January 11,2007 Page 3 Lincoln A venue/L vdia Avenue . Based on a planning level critical lane calculation, this intersection is handling volumes that exceed its design capacity, with approximately 885 vehicles per hour. The typical capacity threshold for an unsignalized intersection is approximately 700 vehicles per hour. . The overall average intersection delay is reported as 42 seconds, which represents LOS E. Mitigation should be provided to improve the operations to LOS D or better. Snelling A venue/Lvdia Avenue . A review of the Synchro model outputs indicates that the signal phasing is not consistent between the a.m. and p.m. peak hour analyses. One analysis includes protected-permissive phasing and the other protected only phasing (eastbound and westbound approaches). Snelling Avenue/Lvdia Avenue and Snelling Avenne/Countv Road C2 . The construction of dual eastbound left-turn lanes was recommended as an improvement; however, the signal phasing includes protected-pennissive phasing. This is an unsafe condition and is not typical for dual left turn-lanes. . With the recommended improvements, the intersection continues to operate at LOS F. Recommendations should be made to improve intersection operations to LOS D or better. At a minimum, comments should be made that only high cost major improvements would improve the operations to an acceptable level of service. TRIP GENERATION, DISTRIBUTION AND GROWTH . The Northwestern College Traffic Study projects 6,250 p.m. peak hour trips to be generated by the adjacent AUAR development. This is consistent with the most recent Twin Lakes AUAR Update (projected to generate 6,500 p.m. peak hour trips). . The directional distribution used for the adjacent AUAR development was taken from the previous AUAR completed in May 2001, which is consistent with the most recent Twin Lakes AUAR Update. . Annual growth rates applied to background traffic as part of this Master Plan were found to be similar with the most recent Twin Lakes AUAR Update. YEAR 2026 CUMULATIVE CONDITIONS (BUILD) Fairview A venue/Lvdia Avenue . The operations analysis results and recommendations are consistent with the recently completed micro-simulation modeling of this area.