Laserfiche WebLink
Santa Ana — Garden Grove Streetcar Project <br />Traffic Study Addendum <br />3.0 Impact Assessment <br />This chapter will describe and assess the impacts of the four proposed Project modifications and new analysis: Santa <br />Ana Boulevard Reclassification, Santa Ana Boulevard Station Relocation, Fairview Street Grade Crossing, and Traffic <br />Signal Priority. <br />3.1 Santa Ana Boulevard Reclassification Impact Analysis <br />3.1.1 Intersection Analysis <br />Table 3-1 shows the results of the intersection LOS analysis at the four affected intersections. At each of the <br />intersections, the approach on Santa Ana Boulevard was reduced from four lanes to two lanes, per the proposed <br />reclassification. <br />Table 3-1 Intersection LOS Summary - Santa Ana Boulevard Reclassification <br />Notes: ICU — intersection capacity utilization (volume -to -capacity ratio) <br />'Traffic Impact Assessment (October 2012) <br />' Reduction in eastbound/westbound approach lanes from four lanes to two lanes <br />As shown in Table 3-1, the Santa Ana Boulevard reclassification would not cause any of the affected intersections <br />to deteriorate to unacceptable LOS (all affected intersections operate at acceptable LOS D or better). The ICU values <br />would be expected to increase by an average of 0.28 in the AM peak hour and 0.56 in the PM peak hour. Detailed <br />LOS worksheets for the reclassification are provided in Appendix B. <br />3.1.2 Roadway Segment Analysis <br />Table 3-2 shows the results of the roadway segment LOS analysis at the seven affected roadway segments. The <br />number of lanes was changed from four lanes to two lanes, with the corresponding target LOS E capacity. <br />® 9 <br />f�� <br />Santa Ana Blvd W <br />Previous Analysis <br />2035 Streetcar Conditions' <br />Santa Ana Blvd <br />Reclassification <br />2035 Streetcar Conditions <br />AM Peak PM Peak <br />Hour Hour <br />AM Peak <br />Hour <br />PM Peak <br />Hour <br />ID <br />Main St <br />Cross St <br />ICU <br />LOS <br />ICU <br />LOS <br />ICU <br />LOS <br />ICU <br />LOS <br />Delta <br />1 <br />Santa Ana Blvd <br />Raitt St <br />0.60 <br />A <br />0.84 <br />D <br />0.61 <br />B <br />0.89 <br />D <br />+0.01 <br />+0.05 <br />2 <br />Santa Ana Blvd <br />Pacific Ave <br />0.25 <br />A <br />0.44 <br />A <br />0.33 <br />A <br />0.58 <br />A <br />+0.08 <br />+0.12 <br />3 <br />Santa Ana Blvd <br />Bristol St <br />0.52 <br />A <br />0.64 <br />B <br />0.61 <br />B <br />0.84 <br />D <br />+0.09 <br />+0.20 <br />4 <br />Santa Ana Blvd <br />Shelton St <br />0.36 <br />A <br />0.41 <br />A <br />0.46 <br />A <br />0.60 <br />B <br />+0.10 <br />+0.19 <br />Notes: ICU — intersection capacity utilization (volume -to -capacity ratio) <br />'Traffic Impact Assessment (October 2012) <br />' Reduction in eastbound/westbound approach lanes from four lanes to two lanes <br />As shown in Table 3-1, the Santa Ana Boulevard reclassification would not cause any of the affected intersections <br />to deteriorate to unacceptable LOS (all affected intersections operate at acceptable LOS D or better). The ICU values <br />would be expected to increase by an average of 0.28 in the AM peak hour and 0.56 in the PM peak hour. Detailed <br />LOS worksheets for the reclassification are provided in Appendix B. <br />3.1.2 Roadway Segment Analysis <br />Table 3-2 shows the results of the roadway segment LOS analysis at the seven affected roadway segments. The <br />number of lanes was changed from four lanes to two lanes, with the corresponding target LOS E capacity. <br />® 9 <br />f�� <br />