Laserfiche WebLink
As shown in Figures 3.4-2 and 3.4-3, the majority of a.m. (7:30 a.m. to 8:30 <br /> a.m.) and p.m. (4:30 p.m. to 5:30 p.m.) peak hour traffic volume in the project area is <br /> along State Route 88. The traffic counts at the intersections of Mackville Road and <br /> Collier Road with State Route 88 indicated through traffic volumes ranging from 185 to <br /> 335 vehicles during the a.m. peak hour and from 246 to 486 vehicles during the p.m. <br /> peak hour. For comparison, the through traffic volumes on Jahant Road at its <br /> intersection with Tully Road were 3 (eastbound) and 17 (westbound) during the a.m. <br /> peak hour and 18 (eastbound) and 12 (westbound) during the p.m. peak hour. <br /> Existing Intersection LOS <br /> To determine the existing operating conditions of the selected intersections, the <br /> unsignalized method of capacity analysis of the Highway Capacity Manual was used. <br /> This method calculates the level of service (LOS) of each lane on the minor approaches <br /> to a STOP-controlled intersection. The LOS criteria for this method is based on the <br /> reserved, or unused, capacity of the lane being evaluated. The overall LOS at an <br /> intersection is indicated as the lowest LOS experienced by a movement at that <br /> intersection. Table 3.4-1 shows the LOS criteria for unsignalized intersections. <br /> The results of the capacity analysis for existing conditions at the critical <br /> intersections are shown in Table 3.4-2. Because the existing quarry and processing <br /> facility are currently operating, it should be understood that the existing traffic volumes <br /> reflect the truck trips currently generated by the quarry operation. <br /> It can be seen from Table 3.4-2 that the intersections of State Route 88 with <br /> Collier Road and Mackville Road are currently operating at LOS C during the p.m. peak <br /> hour, indicating average traffic delays. The remaining intersections are currently <br /> operating at LOS A, indicating little or no delay. The acceptable level of service in San <br /> Joaquin County is LOS C or better. <br /> 3.4.2 Impacts <br /> The traffic volumes and turning movements observed for existing conditions, as <br /> discussed above, include the truck traffic currently associated with the processing <br /> facility and quarry operation. Therefore, the operation of the proposed project, which <br /> 64 <br />