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T RAFFIC I MPACT A NALYSIS S EPTEMBER 2017 C HRIST O UR S AVIOR C ATHOLIC P ARISH S ANTA A NA , O RANGE C OUNTY , C ALIFORNIA P:\DOM1701\doc\Traffic Impact Analysis.docx «09/20/17» 3 Access to the project site is currently provided via a driveway off the south leg of Raitt Street/Alton Avenue and a gated right-in/right-out driveway on Alton Avenue. The project will reconstruct the intersection of the main entry driveway with Raitt Street to provide more turn-around space. The project proposes to add a gate to the Church side of the access. The project will maintain the existing right-in/right-out driveway and gate from Alton Avenue. An additional driveway and gate with a Knox-Box is proposed at the northern terminus of Jaguar Way. The project will also construct a fire lane off this southern driveway, which will be accessible from Jaguar Way without interference from the gate. Figure 2 shows the project site plan. METHODOLOGY This TIA is prepared consistent with the objectives and requirements of the City’s Capacity Calculations and Level of Service Standards and applicable CEQA provisions. City staff reviewed the scope of work for this traffic analysis. Figure 3 illustrates the locations of the intersections included in the study area. Figure 4 provides the existing geometrics and traffic control at each study area intersection. The study area analyzed in this report includes the following intersections: Study Area Intersections 1. Raitt Street/Alton Avenue 2. Jaguar Way/Project Driveway (unsignalized) 3. Jaguar Way/Proposed Residential Driveway (unsignalized) 4. Raitt Street-Jaguar Way/MacArthur Boulevard 5. Project Driveway/Alton Avenue (unsignalized) Intersection Level of Service Methodology Traffix Version 8.0 computer software was used to determine the level of service (LOS) at signalized intersections based on the intersection capacity utilization (ICU) methodology, while Synchro Version 9.1 computer software was used at the unsignalized project driveway using the Highway Capacity Manual (HCM) methodology. The ICU methodology was used to determine the LOS for the signalized study area intersections consistent with City requirements, including 5 percent loss time, 1,700 vehicle per lane per hour capacity for through lanes, and 1,600 vehicle per lane per hour capacity for turn lanes. The ICU methodology compares the volume-to-capacity (v/c) ratios of conflicting turn movements at an intersection, sums up these critical conflicting v/c ratios for each intersection approach, and determines the overall ICU. The HCM methodology calculates the delay experienced by vehicles passing through the intersection. The resulting ICU or delay is expressed in terms of LOS, where LOS A represents free-flow activity and LOS F represents overcapacity operation. LOS is a qualitative assessment of the quantitative effects of such factors as traffic volume, roadway geometrics, speed, delay, and maneuverability on roadway and intersection operations. LOS criteria for intersections are described in detail below. 3-54