P & D CONSULTANTS, INC - Laserfiche WebLink

Home Browse Search

Page 4 Pedro Guillen March 8, 2007 As included in the previous traffic study for City Place and as usually requested by the City of Santa Ana, this traffic study will include a traffic analysis for General Plan buildout. Daily background traffic forecasts at General Plan buildout will be supplied by the Orange County Transportation Authority (OCTA) from the Orange County Traffic Analysis Model (OCTAM). The General Plan buildout year in OCTAM was recently updated from 2025 to 2030. The 2030 daily background traffic forecasts will be post -processed to determine the peak hour intersection turning volumes. P&D will generate project traffic from the Institute of Transportation Engineers' (ITE's) Trip Generation and other trip generation resources. The project traffic will then be distributed and assigned to the circulation network based on OCTAM. Traffic Impact Analysis P&D will conduct a traffic impact analysis for the study area defined in Existing Conditions for the following scenarios: • Existing Conditions (2007) • Opening Year (year to be determined [TBD]) without the Project • Opening Year (year TBD) with the Project • Opening Year (year TBD) with the Project with Mitigation (if needed) • General Plan Buildout (2030) without the Project • General Plan Buildout (2030) with the Project • General Plan Buildout (2030) with the Project with Mitigation (if needed) P&D will calculate the Level of Service (LOS) for each of the study road segments, ramp segments and intersections. The road segment LOS will be determined on a daily maximum volume for each corresponding LOS and road classification. The ramp segment LOS will be determined based on the hourly volume -to -capacity (VIC) ratio. The LOS for signalized intersections will be based on the Intersection Capacity Utilization (ICU) methodology. The LOS for signalized intersections at the California Department of Transportation (Caltrans) ramps will be based on the Highway Capacity Manual (HCM) methodology. The LOS for unsignalized intersections will be based on the HCM methodology P&D will identify project -related traffic impacts based on a comparison of the results of LOS analyses between the applicable scenarios listed above. Project impacts will be based on City's standards. P&D will conduct the peak hour signal warrant analysis for Lawson Way at Memory Lane to determine if traffic signals are warranted at these locations for existing and future conditions. The signal warrant analysis will be conducted using the methodology described in the California Manual on Uniform Traffic Control Devices (CA MUTCD). Mitigation Measures (If Necessary) As appropriate, mitigations measures designed to reduce potential circulation impacts to acceptable levels will be identified. Evaluation of potential mitigation measures and an analysis of their effectiveness will be provided. The analysis may include schematic drawings of impacts and proposed intersection layouts.