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A. OF iq1. <br />a 'fi IBC VISION PLAN 2o18 TRAFFIC STUDY UPDATE - <br />ALTERNATIVES ANALYSIS <br />'S, Final <br />The following sections discuss the intersection deficiencies and recommended mitigations for each <br />jurisdiction within the study area. <br />3.7.E City of Santa Ana <br />There are two location in the City of Santa Ana which require mitigation. Table 3.8 identifies the <br />improvement strategy and corresponding ICUs. The following mitigation is recommended for the intersection <br />that is significantly impacted by the proposed plan update: <br />Intersection #719: Flower Street and Segerstrom Avenue <br />This intersection is deficient under the Buildout Cumulative With Update and is forecast to have a <br />significant impact under the Alternative 2 scenario during the PM peak. Because of the high <br />westbound volume on Segerstrom Avenue in the morning, the recommended improvement is to <br />widen the road to add a westbound right -turn lane. The improvement would bring the deficient <br />intersection back to an acceptable LOS. <br />• Intersection #720: Flower Street and MacArthur Boulevard <br />This intersection is forecast to have a significant impact under the Alternative 2 scenario during the <br />PM peak. Because of the high eastbound volume on MacArthur Boulevard during the AM Peak hour, <br />the recommended improvement is to widen the road to add an eastbound right -turn lane. The <br />improvement would bring the deficient intersection back to an acceptable LOS. <br />Table 3.8 — City of Santa Ana Intersection Improvements <br />719 Flower St at 0.84 D 1.02 E 0.84 D 0.97 E Add WBR 1.1% <br />Segerstrom Ave <br />Flower St at <br />720 MacArthur 0.91 E 0.88 D 0.86 D 0.88 D Add EBR 1.0% <br />Boulevard <br />*Fair -share percentage is shown for informational and comparison purposes only <br />3.7.2 Freeway Ramps <br />There are 24 freeway ramp which are deficient under the Alternative 2 future scenarios. The volumes are <br />generally consistent with the Buildout With Update scenario forecast volumes, with one ramp experiencing <br />an increase in the peak hour volume of over 30 vehicles per hour, triggering an impact under the impact <br />criteria as agreed to by the City of Irvine and Caltrans. Table 3.9 identifies the one impacted freeway ramp <br />and fair -shares under the Alternative 2 conditions for information and future planning purposes. <br />Table 3.9—Alternative 2 Freeway Ramp Plan Update Impacts and Fair -Share <br />.T�.. ............... . <br />''•: ••~•• ........ Iteris, Inc. 185 <br />