Item 18 - Measure M2 Funding Eligibility 2026-27 Renewal

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EXHIBIT 4 In cooperation with OCTA, the City also plans to adopt and implement a new, data-driven methodology based on probe-vehicle speed data. Under this methodology, average operating speed is compared with the corridor's free-flow speed to calculate an Adjusted Level of Service(LOS).This metric provides a high-level indication of corridor performance, capturing the effects of travel time, progression quality, and the frequency of stops. Average travel speed also indirectly reflects fuel consumption and emissions, offering an additional indicator of operational efficiency. Corridors operating at speeds closer to free-flow conditions receive higher Adjusted LOS ratings, while those operating at lower speeds indicate reduced coordination efficiency and may warrant signal timing updates or additional review. To ensure consistency in evaluating performance, the following Adjusted LOS criteria are applied: Using these criteria, the City evaluated each synchronized corridor by comparing its average percent of free-flow speed during the AM, Mid-day, and PM peak periods. The results are summarized in Table 7, which assigns an Adjusted Level of Service to each corridor and highlights locations where progression is strong, as well as corridors where reduced travel speeds indicate the need for timing updates or additional operational review. The route number identified in the table corresponds to the OCTA route identification. LOS Desirable Speed A Average Travel Speed exceeds 90%of the base free-flow speed B Average Travel Speed is between 80%and 90%of the base free-flow speed C Average Travel Speed is between 70%and 80%of the base free-flow speed D Average Travel Speed is between 60%and 70%of the base free-flow speed E Average Travel Speed is between 50%and 60%of the base free-flow speed F JAverage Travel Speed is less than 50%of the base free-flow speed II i.N�ys'4'4l SANTA ANA LOCAL SIGNAL SYNCHRONIZATION PLAN I 25