ICF INTERNATIONAL (JONES & STOKES ASSOCIATES, INC.) - 2011

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Environmental Consulting Services (20o East First American Way) I City of Santa Ana TIA Task 3: Trip Generation, Distribution, and Assignment ■ Prepare trip generation forecasts for the proposed project for a typical weekday over a 24-hour period, as well as for the commuter AM and PM peak hours. The trip generation forecasts will be derived from trip rates listed in Trip Generation, 8th Edition, published by the Institute of Transportation Engineers (ITE) in 2008. Appropriate trip generation credits will also be applied for the existing land uses on site, mixed -use development, and transit, if applicable. ■ Assign the forecasted AM and PM peak hour trips expected to be generated by the proposed project to the study intersections based on existing and anticipated traffic patterns to and from the project site, and input from City staff. The assumed distribution pattern will be submitted for review and approval by City staff prior to finalization. ■ Prepare trip generation forecasts for the related projects for a typical weekday over a 24-hour period, as well as for the commuter AM and PM peak hours utilizing the ITE Trip Generation publication. The AM and PM peak hour trips expected to be generated by the related projects will be distributed and assigned to the local street system. TIA Task 4: Formulation of Existing Plus Project, Near -Term, and long-term Traffic Volumes ■ Develop daily, AM peak hour and PM peak hour "existing plus project" traffic volume projections for i5 intersections and i5 roadway segments. ■ Develop daily, AM peak hour and PM peak hour "near -term" traffic volume projections based on the application of an annual growth factor to the existing traffic volumes plus the addition of related project traffic plus the addition of Project traffic for 15 intersections and i5 roadway segments. ■ Contact OCTA and formally request preparation of OCTAM 3.3 approved computer traffic model runs for the model baseline conditions, and Year 2035 buildout conditions for the AM and PM peak periods and daily traffic conditions. ■ Forecast future Year 203.5 traffic volumes using the following methodology: (a) Peak period traffic volumes will be converted to peak hour (i.e., one -hour) traffic volumes using a conversion factor of 0.38 for the AM peak hour and 0.28 for the PM peak hour; (b) Calculate the difference between the model baseline and the Year 2035 buildout peak period traffic volumes and convert to AM and PM peak hour (i.e., one -hour) link traffic volumes; (c) Link traffic volumes (i.e., two-way directional traffic volumes on each roadway segment) will be post - processed using the "b-turns" program and the relationship of the base year validation model run output to the base year "ground" traffic counts to develop 2035 AM and PM peak hour traffic volumes. TIA Task 5: Project Evaluation and Mitigation Analysis ■ Prepare AM peak hour and PM peak hour Level of Service (LOS) calculations at up to fifteen (i5) study intersections to determine the potential impacts of the proposed project. The following traffic scenarios will be prepared. (a) Existing Traffic Conditions, (b) Existing Plus Project Traffic Conditions; (c) Scenario (b) with Mitigation, if necessary; (d) Near -Term Background Traffic Conditions (Existing plus Ambient Growth plus Related Projects), (e) Near -Term Background Plus Project Traffic Conditions; (f) Scenario (e) with Mitigation, if necessary; (g) Long -Term (2035) Traffic Conditions; (h) Long -Term (2035) Traffic Conditions Plus Project; and (i) Scenario (h) with Mitigation, if necessary. ■ The LOS calculations will be based on City -approved capacity analysis methodologies (i.e., Intersection Capacity Utilization method, Highway Capacity Manual method, etc.). The future background traffic volumes will be forecast by applying a growth factor (typically estimated at 1.0 to 2.0% per year) to the existing traffic volumes and adding traffic from cumulative developments (related projects) in the study area, while long-term projections will be forecast based on OCTAM 3.3 traffic forecasts. Prior to initiation of the analysis, we will confirm the traffic analysis conditions with City staff. ■ Assess the impact of the project based on the results of the peak hour intersection analyses, the City's LOS standards and application of the City's significance criteria. Based on this assessment, determine which intersections (if any) will Use or disclosure of data contained on this sheet is subject to the restriction on the title page of this proposal. is Page 11