(3)AR 121509 Environmental Addendum

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rates for High -Cube Warehouses generally include accessory office uses within these warehouses. Thus, the traffic generated by accessory office uses in this project's High - Cube Warehouses has been accounted for in the traffic generation rates for High -Cube Warehouse. The Traffic Impact Analysis and the EIR both accurately calculated the High - Cube Warehouse trip generation rate for the Project. The discussion above clarifies the square footage and methodology used to reach that conclusion. 2. Project Traffic Growth In the Ruling, the Court stated that there was no evidence explaining how traffic from the Project was incorporated into the traffic growth projections. The following explanation details the traffic growth calculation methodology, including how the projected Project traffic was incorporated. The methodology used is the standard required by SANBAG. As a part of the analysis of traffic impacts resulting from the project, the EIR analyzed the projected cumulative traffic at the intersections affected by the project between 2009, the previously anticipated opening year of the project, and 2030. Therefore, the starting point for the calculation of the projected traffic growth is the volume of traffic at each of the affected intersections in 2009, the Opening Year Average Daily Traffic ("ADT") Volume. Following the determination of Opening Year ADT, annual growth in traffic volume is estimated in accordance with SANBAG standards to determine annual traffic volume through the year 2030, the Year 2030 ADT Volume. The following methodology is used to calculate Opening Year ADT. An example of this methodology is illustrated in Exhibit B. which demonstrates the actual calculations for one of the many intersections studied (Agua Mansa Road immediately North of El Rivino Road). Calculation of Opening Year ADT Volume: 1) The first step of the analysis was to identify the baseline 2007 actual traffic volumes. These existing traffic volumes were obtained from two sources. For State routes and freeways, the California Department of Transportation performs twenty-four hour counts that the EIR Traffic Consultant, Kunzman Associates, Inc., relied upon. For surface streets, Kunzman Associates performed its own counts during peak hours and, as is standard in the industry, extrapolated those findings into twenty-four hour counts, the estimated volume of traffic during a 24-hour period. 2) The second step of the analysis incorporated data from the Year 2000-2030 traffic in the East Valley Traffic Model ("EVTM") into the EIR's traffic growth projections. The EVTM is a focused traffic model administered for the entire region by the City of San Bernardino. It begins wc-141612 7