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TRAFFIC IMPACT ANALYSIS FAIRVIEW STREET IMPROVEMENTS FROM 9T" STREET TO 16T" STREET AND /\ <br />JUNE 2018 BRIDGE REPLACEMENT PROJECT J" <br />SANTA ANA, CALIFORNIA <br />Several of the study intersections are shown to operate at higher levels of delay or capacity <br />compared to the 2021 No Build condition because of the rerouting of regional north -south vehicular <br />traffic from parallel routes that may now use Fairview Street due to the proposed improvements. <br />Exceptions include the intersections of Fairview Street at 17th Street and 12th Street, which operate <br />better due to reductions in travel patterns (higher north -south through traffic, while lower east - <br />west turning movements at 171h Street) and changes in access (12th Street). It should be noted that <br />implementation of the project would result in prolonged delay for the eastbound left -turn <br />movements at the intersection of Fairview Street at 16th Street. This represents a worsening of <br />access conditions to 9 a.m. and 5 p.m. peak -hour conditions. <br />As Table D shows, the proposed increase in roadway capacity to Fairview Street south of 16th Street <br />is anticipated to accommodate both ambient existing to 2021 traffic growth and north -south <br />regional traffic rebalancing at satisfactory LOS C. This is an improvement over both existing and 2021 <br />No Build overcapacity traffic conditions. <br />2040 No Build Conditions <br />Figure 7 shows the OCTAM forecasted a.m. and p.m. peak -hour traffic volumes. As shown in Table E, <br />the intersections along Fairview Street are anticipated to operate at acceptable LOS with the <br />exception of the following intersections: <br />Fairview Street/171h Street (LOS F in both a.m. and p.m. peak hours) <br />Fairview Street/16th Street (LOS E during the a.m. peak hour) <br />Fairview Street/91h Street (LOS F in both a.m. and p.m. peak hours) <br />Table E: 2040 Intersection LOS Summary <br />Intersection <br />Existing Conditions <br />2040 No Build Conditions <br />2040 Build Conditions <br />AM Peak <br />Hour <br />PM Peak <br />Hour <br />AM Peak <br />Hour <br />PM Peak Hour <br />AM Peak <br />Hour <br />PM Peak Hour <br />vac <br />Delay <br />LOS <br />vac <br />Delay <br />LOS <br />vac <br />Delay <br />LOS <br />vac <br />Delay <br />LOS <br />Vic <br />Delay <br />LOS <br />Vic <br />Delay <br />LOS <br />1 <br />Fairview St/171h St <br />0.835 <br />D <br />0.902 <br />E <br />1.071 <br />F <br />1.258 <br />F <br />1.031 <br />F <br />1.195 <br />F <br />2 <br />Fairview St/16" St' <br />31.6 <br />D <br />20.0 <br />C <br />48.1 <br />E <br />24.9 <br />C <br />>50.0 <br />F <br />41.7 <br />E <br />3 <br />Fairview St/12t St' <br />25.1 <br />D <br />19.0 <br />C <br />32.0 <br />D <br />23.4 <br />C <br />30.6 <br />D <br />22.3 <br />C <br />4 <br />Fairview St/9t Stl <br />>50.0 <br />F <br />47.4 <br />E <br />>50.0 <br />F <br />>50.0 <br />F <br />>50.0 <br />F <br />>50.0 <br />F <br />5 <br />Fairview St/Civic Center Dr <br />0.642 <br />B <br />0.640 <br />B <br />0.766 <br />C <br />0.705 <br />C <br />0.908 <br />E <br />0.876 <br />D <br />= unsatisfactory LOS <br />The intersection is unsignalized and was assessed using the HCM methodology. Delay values shown are in seconds per vehicle. <br />LOS = level of service <br />>50.0 = HCM delay value is greater than 50.0 seconds per vehicle, LOS F <br />v/c = volume -to -capacity ratio <br />This represents a general worsening of intersection operations under 2040 No Build conditions. <br />As shown in Table F, forecasted increases to daily traffic volumes along Fairview Street from existing <br />to 2040 No Build conditions are anticipated to continue to result in unsatisfactory roadway segment <br />LOS for the four -lane segments of Fairview Street. <br />P:\WKE1702\Traffic\doc\Traffic Analysis Report rev - Caltrans Comments.docx u06/07/18» 14 <br />