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City of Santa Ana <br />Signal <br />Local Si l Synchronization Plan <br />g Y <br />CSPI �. <br />" S 80 Very good progression — traveling through signalized intersections Tier i <br />with minimal stops and favorable travel speeds. <br />070-80 I Good progression —traveling through signalized intersections with Tier 2 <br />few stops and good travel speeds. <br />60-70 Fair progression — traveling through signalized intersections with Tier 3 <br />moderate stops and fair travel speeds. <br />050-60 Limited progression* — traveling through signalized intersections Tier 4 <br />with moderately high stops and slower travel speeds. <br />< 50 Very limited progression* —traveling through signalized Tier 5 <br />intersections with frequent stops and slow travel speeds. <br />Figure 6 - CSPI Score and Description <br />Over the past three years from 2020 to 2023, the City, in cooperation with OCTA and other local <br />agencies, participated in synchronizing a number of important corridors in the City and adjacent <br />jurisdictions. Many corridors have been previously synchronized and maintained, however due <br />to changes in traffic conditions and patterns, periodically complete re -time is necessary and can <br />result in significant improvement in travel time and reduction in delays. <br />The following corridors were synchronized or currently in the process of implementation: <br />• Fairview St, Bear St, and Garden Grove/Memory Ln Corridors synchronization were <br />completed in 2022. <br />• Main St Corridor synchronization was completed in 2021 and is currently in the <br />monitoring stage for 2 years. <br />• Warner Ave Corridor synchronization is ongoing and expected to be completed by <br />winter 2023. <br />• Edinger Ave Corridor synchronization is ongoing and expected to be completed by <br />Winter 2023. <br />Page 31 2023 <br />