Item 20 - Memorandum of Understanding of the Master Plan of Arterial Highways Amendment

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Memorandum of Understanding for the Master Plan of Arterial Highways Amendment and Irvine Business Complex Agreement Amendment July 1, 2025 Page 3 discussion to include unresolved mitigations resulting from the City of Santa Ana's General Plan update with the goal of obtaining the best overall outcomes for Santa Ana. City of Irvine and OCTA Memorandum of Understanding The City of Irvine proposes to reduce Red Hill Avenue between MacArthur Boulevard and Main Street from a six -lane divided highway to a four -lane divided highway as part of the IBC Vision Plan and prepared an associated traffic study. Among other things, the traffic analyzes cross -jurisdictional impacts, mitigations, and fair share values. Staff has reviewed the study and fair share amounts and found that the calculations are accurate and in line with standard transportation norms. Staff finds that the proposed fair share amounts resulting from the IBC Vision Plan update are confirmed to be accurate and correct. As part of the negotiations with Irvine and OCTA, alternate traffic improvements from the ones originally proposed in the study were discussed. Staff proposed selecting the following two intersections from the City's traffic signal priority list for mitigation improvements: Flower Street at Segerstrom Avenue, and Flower Street at MacArthur Boulevard. Prior city traffic study assessments identified the need for left -turn arrows at both of these intersections' traffic signals. To date, these locations are on the City's traffic signal priority list. Understanding the need for improvements at these two intersections, Irvine and OCTA agreed that the fair share funds identified in the MOU will go towards funding these locally preferred improvements to install left turn arrows at both locations. With the approval of the MOU, the City of Irvine will provide the City of Santa Ana fair share funding for Flower Street at Segerstrom Avenue in the amount of $37,224 and fair share funding for Flower Street at MacArthur Boulevard in the amount of $45,070. These fair share funds will be leveraged with existing Council approved funds to construct the improvements. Both projects are identified in the City's Capital Improvement Program (CIP). The Flower at Segerstrom project is fully funded and will be in bid phase this month. The Flower at MacArthur intersection was recently approved by Council and staff has commenced on the design phase. Staff recommends approval of the Memorandum of Understanding with Irvine and OCTA (Exhibit 1).