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First Street Multimodal Boulevard Study <br />February 17, 2026 <br />Page 11 <br />5 <br />5 <br />3 <br />4 <br />Concepts East of Zoo Lane <br />For the eastern segment (I-5 to Tustin Avenue), a consistent four-lane configuration to <br />match the existing cross-section of First Street within City of Tustin limits with expanded <br />pedestrian and bicycle zones is proposed across all alternatives, building on a planned <br />City rehabilitation project and Caltrans’ Freeway Ramp Active Mobility Enhancement <br />Study (FRAMES) concept. This configuration is consistent with the vision and design <br />standards included in the Metro East Mixed-Use Overlay Zone. The Fact Sheet for the <br />East Side Concept is provided in Exhibit 7. <br />TRAFFIC EVALUATION OF CONCEPTS <br />Traffic modeling using VISSIM was conducted for opening year (2028) and design year <br />(2048) conditions. Detailed traffic operational results are included in Exhibit 1. <br />Key findings include: <br />All concepts generally operate at acceptable levels of service in the opening year <br />with targeted intersection improvements;