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Revised Traffic Impact Study March 27,2008 Proposed CEMEX Mining Site Page 3 It is noted that the construction of an interchange is pending to replace the intersection of SR 132 and Bird Road. It is possible that the Project will be approved prior to completion of the interchange. It is also noted that Caltrans has long-range plans to upgrade SR 132 to a freeway between I-580 and Modesto. However,these plans are not programmed, funded, or designed. — 5.0—TRAFFIC VOLUMES 5.1 —Existing Traffic Volumes Existing traffic volumes were determined by performing manual turning movement counts at each of the study intersections. The counts were performed by the independent traffic counting firm of Field _ Data Services or by Peters Engineering Group staff. The count data sheets are presented in Appendix A and include the date the counts were performed. Existing peak-hour turning movement volumes at the study intersections are presented in Figure 6. Traffic volumes on freeways and _ freeway ramps were determined by reviewing data available on the Caltrans web site, data presented in previous Environmental Impact Reports, and balancing with existing traffic counts on SR 132. In addition to manual turning movement counts, 24-hour machine counts were performed at various �- locations. The results of the counts are presented in Appendix A. Considering the number of aggregate mines in the vicinity of the site, the traffic counts were performed during wane seasons with the intention of counting maximum production periods and thereby eliminating the need for seasonal adjustment factors. Therefore, seasonal adjustment factors were not applied to the existing traffic volumes. _ 5.2—Proiect Traffic Volumes Daily and peak-hour Project traffic volumes were determined based on the maximum amount of _ material expected to be generated by the Project and the capacity of the trucks hauling the material. Employee traffic is not expected to occur during the peak hour and is not included in the analyses. The calculation includes an assumed seasonal adjustment factor of 1.6. This adjustment is applied to _ convert the average annual daily and peak-hour Project traffic volumes to the corresponding volumes that would be expected during warm months when production reaches seasonal peaks. Table 1 presents daily and peak-hour Project traffic volumes expected during peak months. The anticipated Project traffic volumes at the study intersections are presented in Figure 7 and 8 for Haul Routes 1 and 3, respectively. The distribution of Project traffic to the adjacent road network was determined based on discussions with the Project Applicant and County staff during a Project _ site walk-through.