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

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Public Works Agency www.santa-ana.org/public-works Item # 21 City of Santa Ana 20 Civic Center Plaza, Santa Ana, CA 92701 Staff Report April 16, 2024 TOPIC: Master Plan of Arterial Highways AGENDA TITLE Memorandum of Understanding for the Master Plan of Arterial Highways with the Orange County Transportation Authority and the City of Irvine RECOMMENDED ACTION Authorize the City Manager to execute a Memorandum of Understanding for the Master Plan of Arterial Highways Amendment with the Orange County Transportation Authority and the City of Irvine (Agreement No. A-2024-XXX). GOVERNMENT CODE 484308 APPLIES: Yes DISCUSSION The Master Plan of Arterial Highways (MPAH) is the countywide roadway network for regional mobility managed by the Orange County Transportation Authority (OCTA), and cities must comply to qualify for M2 Funds. Coordination and consensus between the cities is required whenever changes to the MPAH are requested by any of local agencies that form part of the MPAH. The process described below was similarly followed by the City of Santa Ana (City) when an MPAH amendment was processed by the City back in June 2021 to reclassify several roadways in the City. The City of Irvine has requested an amendment to the MPAH to reclassify Red Hill Avenue, between MacArthur Boulevard and Main Street, from a major six -lane to a primary four -lane arterial. The IBC Vision Plan 2018 Traffic Study Update Alternative Analysis (Exhibit 1), conducted as part of the MPAH amendment process, determined that the amendment to the MPAH would result in cumulative projected changes to future traffic patterns. These projected changes in future traffic patterns result in a determination that appreciable impacts may occur at the intersections of Flower Street/MacArthur Boulevard and Flower Street/Segerstrom Avenue, both intersections which are located in the city. Improvements identified to mitigate appreciable impacts at the two intersections will be fully mitigated by adding an eastbound right turn lane at the intersection of Flower Street and MacArthur Boulevard and adding a westbound right turn lane at the intersection of Flower Street and Segerstrom Avenue which require right-of-way acquisition. It should be noted that the City will monitor the individual intersection performance and is only required to implement such improvements should the thresholds impacting the operations of the intersections be triggered.