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?attcatiorr 1st <br />City of Santa Ana <br />Updated Proposal for the 301 East Jeanette Lane <br />Residential Project Mitigated Negative Declaration <br />Stud r a, The traffic study area will consist often (10) study. intersections and ten (10) midblock roadway segments in <br />the project vicinity identified for analysis by City staff. <br />As part of the analysis, RBF will collect existing non-classified traffic count volumes at the study intersections and midblock <br />roadway segments on a typical weekday (Tuesday, Wednesday, or Thursday). Intersection traffic count data will be <br />collected during 7:00 to 9:00 in the a.m. peak period and 4:00 to 6:00 in the p.m, peak period; the analysis will utilize the <br />highest hour within each two-hour period counted. Roadway segment data will be collected over a 24-hour period, <br />Site Visif/Existing Svstems Documentation. RBF will visit the traffic study area to document existing conditions including <br />intersection control, traffic signal phasing, roadway cross-section, speed limits, parking restrictions, intersection approach <br />lanes, etc. The traffic analysis will include graphics documenting the existing intersection roadway geometry, and the <br />analysis will utilize existing geometric conditions to establish a baseline for current operations. <br />Cumulative Projects Trip Generation. Distribution, and Assignmenf. RBF will coordinate with City of Santa Ana staff to <br />identify an annual traffic growth rate to account for cumulative projects in the vicinity of the project site and/or a list of <br />cumulative projects for inclusion in the traffic impact analysis, The study will identify the number of daily and peak hour trips <br />forecast to be generated by cumulative approved/pending projects, using trip generation rates contained in Trip Generation <br />(Institute of Transportation Engineers, 9th Edition, 2012) or other source as directed by agency staff. <br />Proposed Project Trip Generation, Trip Distribution, and Assionmenf. RBF will derive forecast projecttrip generation using <br />trip generation rates contained in Trip Generation (Institute of Transportation Engineers, 9th Edition, 2012) orothersource <br />as directed by agency staff. RBF will manually derive assumptions regarding distribution and assignment which will be <br />reviewed and approved by City staff prior to inclusion in the analysis. <br />Forecast Future Tragic Volumes. Forecast future traffic volumes will be derived by increasing existing traffic volumes by an <br />annual growth rate factor, provided by City Staff, and/oradding trips associated with cumulative projects (provided by City <br />Staff) to the measured existing traffic volumes, RBF will consult with. City staff to obtain a list of applicable programmed <br />street improvements for the study area circulation system in the future year scenarios. <br />Level of Service Analysis. The analysis will assess the forecast traffic conditions at the study intersections and mid block <br />roadway segments for the analysis scenarios identified above. RBF will prepare a Trafrx based analysis model to assess <br />traffic conditions at the study intersections using the Intersection Capacity Utilization (ICU) analysis methodology (assuming <br />1600 vehicles/hour lane for turning lanes and 1700 vehicles per hour forthrough lanes, with 5% clearance intervals)forthe <br />signalized study intersections and the Highway Capacity Manual (NCM) analysis methodology for the unsignalized study <br />intersection. The intersection analysis will also include applicable signal warrants at the unsignalized intersections, RBF will <br />prepare a midblock roadway segment analysis utilizing the volume/capacity (vlc) ratio analysis methodology, <br />If the analysis indicates the proposed project will significantly impact a study intersection of midblock roadway segment <br />based on City of Santa Ana thresholds of significance, mitigation measures will be recommended to eliminate or reduce the <br />impact in accordance with City guidelines. The analysis will document forecast operating conditions after implementation of <br />recommended mitigation measures if necessary, <br />State Highway Intersection Anal?is. RBF will prepare a State Highway intersection of the SR-22 Eastbound Ramps- <br />Larson Way/Town & Country Road intersection utilizing the NCM analysis methodology for Signalized Intersections in <br />accordance with Caltrans guidelines for State Highway intersection analysis. This scope of work does not assume any <br />freeway mainline analysis or any ramp queuing analysis. If the analysis indicates the proposed project will significantly <br />impact a study intersection based on Caltrans thresholds of significance, mitigation measures will be recommended to <br />JN 132203 0 8 • February 25, 2013 <br />25C-19