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Mark Culver, PE City of Roseville Improvement Scenario Evaluation January 17, 2019 Page 14 Each improvement scenario was evaluated to determine the potential traffic benefits. The following describes the methodology use and results of the evaluation. Evaluation Methodology Existing traffic volumes used in the analysis were based on data collected in 2014 during the a.m. peak and p.m. peak periods. The turning movement counts were increased for the side -street movements at all intersections, and for the northbound through movement at County Road C, by 20 percent to account for the latent demand along the corridor. Based on stakeholder input and the corridor characteristics, only the p.m. peak hour was analyzed for this study. The evaluation considered three metrics: 1) Change in delay on each of the side -street approaches. 2) Change in throughput leaving the corridor. 3) Cost/benefit of each scenario based on a "value of time" analysis utilizing change in network delay per vehicle. Approach Delay Evaluation Results The first part of the evaluation compared the approach delay at each of the analyzed intersections under existing p.m. peak conditions for all three scenarios. Table 1 summarizes the change in delay for the eastbound and westbound approaches at each intersection. Table 1. Side -Street Approach Delay Summary (P.M. Peak) Scenario Existing Scenario 1 Scenario 2 Scenario 3 Approach Change Change Change Delay Delay Delay Delay Compared to Compared to Compared to (sec/veh) (sec/veh) (sec/veh) (sec/veh) Existing (%) Existing (%) Existing (%) Lydia ED 286 86 -70% 66 -77% 10 -96% Avenue WE 366 160 -66% 76 -79% 6 -99% County ED 80 70 -13% 66 -19% 86 6% Road C2 WE 60 66 8% 66 _8% 66 8% County ED 120 120 0% 70 -42% 116 -4% Road C WE 90 90 0% 65 -28% 85 -6%