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ANALYSIS METHODOLOGY This traffic study includes documentation of Existing Conditions, analyses of cumulative traffic conditions and identification ofproject-related impacts at the following eight study intersections: • Grand Avenue and Warner Avenue • Grand Avenue and Brookhollow Drive • Grand Avenue and Dyer Road • Dyer Road and Main Street • Red Hill Avenue and Dyer / Barranca Parkway • Grand Avenue and SR-55 SB off-ramp (Caltrans) • Dyer Avenue and SR-55 SB off/on-ramp/Hotel Terrace Drive (Caltrans) • Dyer Avenue and SR-55 NB off/on-ramp (Caltrans) The three intersections identified as Caltrans intersections will be evaluated using the Highway Capacity Manual (HCM) methodology for signalized intersections, as required by the Caltrans Guide for the Preparation of Traffic Impact Studies (June 2001). The remaining intersections will be evaluated using the Intersection Capacity Utilization (ICU) methodology, as specified by the City of Santa Ana and the Orange County Congestion Management Program (CMP). For each of the three study intersections, five analysis scenarios will be analyzed for the morning and evening peak hours: • Existing Conditions • Project completion year (Year 2007) without project • Project completion year (Year 2007)with project • 2025 General Plan Build-Out Conditions without project • 2025 General Plan Build-0ut Conditions with project Signalized Intersections -Intersection Capacity Utilization (ICU) Methodology In accordance with the City of Santa Ana and the County of Orange Congestion Management Program (CMP) requirements, peak hour operating conditions at the signalized intersections were evaluated using the Intersection Capacity Utilization (ICU) methodology. The ICU methodology provides a comparison of the theoretical hourly vehicular capacity of an intersection to the number of vehicles actually passing through that intersection during a given hour. Based on City of Santa Ana and County of Orange analysis criteria, the ICU calculation assumes aper-lane capacity of 1,700 vehicles per hour (vph) for each travel lane (through or turning lane) through the intersection. Where there is no separately striped right-turn lane, if the width of the outside through lane is 19 feet or more, and parking is prohibited during the peak period, a separate right-turn lane is assumed. A clearance factor of 0.05 (5%) of the total intersection capacity is included in the ICU calculation, to account for the effect of the red and yellow signal phases at a signalized intersection. The ICU calculation generates avolume-to-capacity (V/C) ratio that translates into a corresponding Level of Service (LOS) measure, ranging from LOS "A", representing uncongested, free-flowing conditions, to LOS "F", representing over-capacity conditions. A summary description of each Level of Service and the corresponding V/C ratio is provided on the following chart: crazy Horse Square - 4 - April, 2006 Food and Retail Center ^ ~3~ 0 0