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1/12/2001 analysis. According to the 1994 Highway Capacity Manual, depending upon approach grade, the PCE factor could range anywhere between 1.0 and 6.0 for heavy vehicle types that include single-unit trucks and tractor-trailer combination vehicles. In their comments on the DSS Quarry EIR, Caltrans has called for PCE factors between 3.0 and 4.0 for large gravel trucks depending upon their length and acceleration characteristics. It should be noted that Yosemite Avenue/Guthmiller Road crosses S.R.120 through an underpass at the S.R.120 interchange. This means large, loaded trucks would have to negotiate the up-slope on S.R.120 eastbound and westbound on-ramps before merging with the S.R.120 mainline traffic stream. In this study, the following PCE factors have been used for intersection operations analysis. • Loaded truck on an up-slope: PCE = 4.0 • Empty truck on an up-slope: PCE = 3.0 • Empty/loaded trucks on a level grade: PCE = 2.0 • Empty/loaded trucks on a down-slope: PCE = 1.5 INTERSECTION TRAFFIC OPERATIONS Intersection traffic volumes under all analysis scenarios are illustrated in Appendix Figure 2. Peak hour intersection operations were quantified at the two study intersections under the different traffic volume scenarios, with currently existing intersection lane geometrics and control. Table 1 summarizes the intersection level-of-service results. All LOS worksheets are included in the Appendix. TABLE 1 INTERSECTION TRAFFIC OPERATIONS - PEAK HOUR LEVELS-OF-SERVICE S.R.120 Eastbound Ramps/ S.R.120 Westbound Yosemite Avenue Ramps/ Yosemite Avenue Traffic Volume Scenario Average LOS Warrant Average LOS Warrant (with Existing Two-Way-Stop Sign Control) Delay Met? Delay Met? Existing AM Peak Hour 9.1 A No 9.1 A No Existing PM Peak Hour 9.8 A No 9.8 A No Existing + Approved Projects AM Peak Hour 9.3 A No 9.4 A No Existing + Approved Projects PM Peak Hour 10.6 B No 10.7 B No Existing + Apprd Projects + Project AM Pk Hr 9.5 A No 9.8 A No Existing + Apprd Projects + Project PM Pk Hr 10.7 B No 10.8 B No Year 2010 Base AM Peak Hour 9.5 A No 9.7 A No Year 2010 Base PM Peak Hour 11.4 B No 11.3 B No Year 2010 Base plus Project AM Peak Hour 9.7 A No 10.0 B No �- Year 2010 Base plus Project PM Peak Hour 11.5 B No 11.5 B No Note:1. Worst-case intersection movement delays and LOS have been indicated. 2. Warrant refers to Caltrans peak hour volume Warrant-11 (Rural Areas). As shown in Table 1, both study intersections currently operate at AM and PM peak hour level-of- service "A" conditions. Under all short-term and long-term future scenarios analyzed, both study intersections are projected to operate at AM and PM peak hour level-of-service "B" or better conditions, with the currently existing intersection lane geometrics and control. None of the study intersections meet Caltrans peak-hour-volume warrant-11 (Rural Areas) under existing or future conditions.