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Santa Ana — Garden Grove Streetcar Project <br />Traffic Study Addendum <br />3.5.3 Intersection HCM Analysis <br />A level of service analysis was conducted using the HCM methodology to compare conditions with and without <br />transit signal priority and the proposed street design concept. In the Synchro traffic software, which utilizes HCM <br />methodology, signal timing and splits were optimized. <br />Table 3-11 summarizes the delay and corresponding LOS for 2035 Streetcar Conditions, with both the transit signal <br />priority adjustments and the proposed street design concept. Table 3-11 also includes the westbound queue length <br />throughout the affected alignment. As discussed previously, TSP would not affect the intersections of Santa Ana <br />Boulevard with Bristol Street, Broadway, and Main Street. <br />Table 3-11 Intersection LOS Summary - Transit Signal Priority and Street <br />Design Concept (HCM Methodology) <br />Cross St <br />IRaitt <br />HN ree esign Concep <br />Westbound Queue <br />Length' <br />2035 Streetcar Conditions) <br />AM Peak Hour <br />Delay LOS <br />PM Peak Hour <br />Delay LOS <br />AM <br />PM <br />1* Santa Ana Blvd <br />St <br />36.5 <br />D <br />66.8 <br />E <br />184' <br />665' <br />2* Santa Ana Blvd <br />Pacific Ave <br />27.7 <br />C <br />17.9 <br />B <br />184' <br />292' <br />3* Santa Ana Blvd <br />Shelton St <br />15.8 <br />B <br />15.80 <br />B <br />170' <br />401' <br />4 Santa Ana Blvd <br />Flower St <br />38.6 <br />D <br />32.6 <br />C <br />333' <br />362' <br />5 Santa Ana Blvd <br />Parton St <br />15.7 <br />B <br />17.2 <br />B <br />196' <br />306' <br />6' Santa Ana Blvd <br />Ross St <br />28.9 <br />C <br />27.7 <br />C <br />256' <br />318' <br />7 Santa Ana Blvd <br />Bush St <br />23.8 <br />C <br />22.4 <br />C <br />363' <br />367' <br />8 Santa Ana Blvd <br />French St <br />12.9 <br />B <br />12.7 <br />B <br />151' <br />150' <br />9 Santa Ana Blvd <br />Lacy St <br />32.1 <br />C <br />25.2 <br />C <br />806' <br />497' <br />10 Santa Ana Blvd <br />Santiago St <br />23.1 <br />C <br />25.3 <br />C <br />280' <br />247' <br />Notes: Delay expressed in average signal delay in seconds. <br />All signal cycle lengths and splits were optimized. <br />* Includes proposed Santa Ana Boulevard reclassification (reduction in EB and WB through lanes from 4 lanes to 2 lanes). <br />*Configuration reflects the removal of existing WB free right -turn due to proposed station relocation. <br />1 Lane configuration based on proposed HNTB Santa Ana Boulevard Street Design Concept. <br />z Reported as the 95th percentile queue forthe westbound approach. <br />As shown in Table 3-11, implementation of the proposed street design concept plan, coupled with TSP, would cause <br />the intersection of Santa Ana Boulevard/Raitt Street to operate at unacceptable LOS E in the PM peak hour. LOS <br />worksheets are contained in Appendix G. <br />® 18 <br />f�� <br />