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Santa Ana — Garden Grove Streetcar Project <br />Traffic Study Addendum <br />The 2010 HCM methodology for signalized intersections evaluates LOS based on controlled delay per vehicle. <br />Controlled delay is defined as the portion of the total delay attributed to the traffic signal operation including <br />deceleration delay, queue move -up time, stopped delay and final acceleration delay. This methodology differs from <br />ICU methodology which sums up volume -to -capacity ratios at critical movements. HCM methodology is the <br />appropriate tool for the grade crossing analysis as signal timing can be adjusted to account for streetcar crossing <br />events. Furthermore, the system interface as a whole (upstream/downstream intersections and the grade crossing) <br />can be evaluated. <br />2.4 Traffic Signal Priority Analysis <br />The requirement of transit signal priority (TSP) for all signalized intersections along the proposed streetcar <br />alignment (with the exception of Santa Ana Boulevard at Main Street, Broadway, and Bristol Street) would affect <br />the following locations: <br />2.4.1 Study Area <br />Affected Intersections <br />1. Santa Ana Boulevard/Raitt Street <br />2. Santa Ana Boulevard/Pacific Avenue <br />3. Santa Ana Boulevard/Shelton Street <br />4. Santa Ana Boulevard/Flower Street <br />5. Santa Ana Boulevard/Parton Street <br />6. Santa Ana Boulevard/Ross Street <br />7. Santa Ana Boulevard/Bush Street <br />8. Santa Ana Boulevard/French Street <br />9. Santa Ana Boulevard/Lacy Street <br />10. Santa Ana Boulevard/Santiago Street <br />11. 4th Street/Bush Street <br />12. 4th Street/French Street <br />13. 4th Street/Mortimer Street <br />® 6 <br />f�� <br />