Item 18 - Appeal Application Nos. 2023-02 and 2023-03 for Cabrillo Town Center project

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assuming full buildout of the Overlay Zone. One roadway segment (Cabrillo Park Drive between First Street and Fourth Street) is expected to operate at an unacceptable LOS under the Overlay Zone with the expected traffic levels and secondary arterial roadway configuration. However, this roadway is currently constructed with a raised median and can be considered to be four lanes divided, justifying a higher allowable daily capacity of 33,800. As such, implementation of the Overlay Zone would not be anticipated to increase traffic volumes such that street segment volume capacities are exceeded, and impacts were determined to be less than significant. In evaluating consistency with the Certified EIR traffic analysis, twenty-nine of the 38 intersections analyzed in the study area would remain at LOS D or better under the "Buildout without Project" conditions, while only 19 of the intersections would operate at LOS D or better under the "Buildout with Project" conditions. Traffic impacts created by the Overlay Zone can be evaluated by comparing these scenarios (with and without project conditions). The Overlay Zone will contribute to unacceptable levels of service at eight of the intersections evaluated in the AM peak hour. The impact at these eight intersections is considered significant based on the identified criteria. It is also important to note that two additional intersections (First Street at Newport Avenue and Irvine Boulevard at Newport Avenue) would also operate at unacceptable levels (LOS E). However, based on the City of Tustin's threshold criteria, these intersections would not be considered significant due to the Overlay Zone because the project's contribution is less than 0.03. The Overlay Zone would contribute to unacceptable LOS at 16 of the intersections evaluated in the PM peak hour, which include a majority of the signalized intersections along Fourth Street between the 1-5 Freeway and the SR-55 Freeway. The impact at these intersections is considered significant based on City criteria. Thus, a total of 17 different intersections would be impacted by buildout of the Overlay Zone during either the AM or PM peak hour, or both, which is considered potentially significant. Full buildout of the Overlay Zone is dependent on future individual development projects, of which the exact type and location is presently unknown. As such, the Certified EIR has identified potential improvement measures below that would serve to reduce the impacts at the seventeen affected intersections. As development occurs within the Overlay Zone, the following improvement measures may be implemented as part of future development projects, as required. In addition, an improvement measure is also identified for the First Street at Newport Avenue, which is not an impact but which does operate at an unacceptable LOS due to background traffic growth. However, some of the intersections that would operate at unacceptable LOS are outside of the jurisdiction of the City. As such, the City cannot ensure implementation of these improvements. If these improvements were not implemented, LOS would remain below acceptable levels as a result of implementation of the proposed Overlay Zone. Cabrillo Town Center City of Santa Ana Technical Memorandum August 2023 City Council 18 — 618 10/3/2023