Item 21 - Memorandum of Understanding with OCTA and City of Irvine

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-1 OF 14 A. L a 'Zfi IBC VISION PLAN 2o18 TRAFFIC STUDY UPDATE — ALTERNATIVES ANALYSIS Final 3 ALTERNATIVE z -RED HILL AVENUE WIDENING (MAIN STREET TO MACARTHUR BOULEVARD) 3.1 Introduction The 2018 Traffic Study Update Alternative 2 is an analysis to observe the impacts of removing the one remaining MPAH roadway network project within the IBC area; the widening of Red Hill Avenue from four to six lanes between Main Street and MacArthur Boulevard. The location of this project is illustrated in Figure 1.2. For this analysis, the Buildout Cumulative With Update is assumed to be the No Project (Baseline) scenario and the Alternative 2 scenario is the With Project scenario. Traffic analysis is performed using the same methodology employed for the Interim and Buildout year analysis. Any forecast deficiency locations are identified, together with identification of the most effective improvement measures to mitigate them. The transportation networks are consistent between these two future scenarios except for one exception, the Alternative 2 scenario removes the Red Hill Avenue widening project currently in the MPAH that would widen the arterial to six lanes between Main Street and MacArthur Boulevard. The Alternative 2 scenario assumes Red Hill Avenue in the project area to have the same configuration as existing conditions. In order to isolate the effects of removing the Red Hill widening to traffic patterns in the study area, the Alternative 2 scenario has the identical land -use as Buildout With Update. 3.2 Alternative 2 Daily Arterial Segment Analysis The Alternative 2 traffic patterns generally remain very similar to the Buildout With Update scenario traffic patterns. The vast majority of road segments see the same traffic volume in both scenarios. Because the Alternative 2 roadway network does not include the Red Hill Widening project, the largest difference in traffic volume between the two scenarios occurs on Red Hill Avenue. Most notably, ADT on Red Hill Avenue between McGaw Avenue and Sky Park decreases by 1,200 vehicles in Alternative 2 compared to the Buildout Cumulative With Update scenario. The list of arterial segments that are deficient in the Alternative 2 scenario are identical to those of the Buildout Cumulative With Update scenario. Deficient segments under daily Alternative 2 conditions are shown in Table 3.1 and are: Campus Drive: o 879—Campus Drive from Carlson Avenue to University Drive (Irvine) • Culver Drive: 0 726—Culver Drive from 1-5 NB Ramps to 1-5 SB Ramps (Irvine) 0 213—Culver Drive from 1-5 SB Ramps to Scottsdale Drive (Irvine) 0 214—Culver Drive from Scottsdale Drive to Walnut Avenue (Irvine) 0 215—Culver Drive from Walnut Avenue to Deerfield Avenue(Irvine) 0 217—Culver Drive from Irvine Center Drive to Warner Avenue (Irvine) 0 219—Culver Drive from Barranca Parkway to Alton Parkway (Irvine) ...:... '.: '''•' ........ ' . Iteris, Inc. 155