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Draft Supplemental Environmental Impact Report Page IV.B-11 _ Forward Inc. Landfill 2014 Expansion Project Impact B.1. Potential Project Impact to LOS at Nearby Intersections. (Revises 2013 EIR — Impact B.1) Project Impacts to Nearby Intersections This section of this traffic study describes conditions that would exist under Existing-Plus- Project conditions. Comparing Existing-Plus-Project conditions to the no project conditions results in an identification of project-related impacts. The California Health Care Facility (CHCF), listed as an approved project in the 2012 Republic ITS report, was completed after that report was prepared, and a signalized intersection was — installed at the entrance of the Facility on Austin Road, as mentioned above. According to the traffic report prepared for CHCF project, the CHCF entrance driveway would operate at LOS A and B in the a.m. and p.m.peak hours,respectively. The added traffic due to the 2014 — Expansion Project(137 a.m. and 28 p.m.peak hour trips)is not expected to worsen the intersection to unacceptable conditions. Therefore, the 2014 Expansion Project would result in a less-than-significant impact at this new intersection. _ The intersection of the CHCF driveway and Austin Road was not a study intersection in the 2012 Republic ITS study, however, its addition does not affect the calculated LOS at study intersections (for all scenarios). (See Impact B.2,below, for a discussion of the effect of this new intersection on travel speeds on Austin Road.) As discussed above, Arch Road was being widened at the time this SEIR was prepared. The widening will be completed before the 2014 Expansion Project is implemented. Therefore, traffic operation at its intersection with Austin — Road, and the associated LOS, would remain the same or be improved. For these reasons, the conclusions of the 2013 EIR discussed below also apply to the 2014 Expansion Project. Traffic volumes and levels of service that would occur at the study intersections are presented in Table IV.B-5 and Figure IV.B-4. The LOS values are calculated after applying a Passenger Car Equivalent factor of 1.5 to the added truck volumes because adding a truck to an intersection has a greater impact than adding a passenger car. This is standard recommended practice according to the Highway Capacity Manual (Transportation Research Board,2000). Therefore, the traffic volumes in the LOS calculations are higher than the actual traffic volumes shown in Figure IV.B-4. Under Existing-Plus-Project conditions, all intersections would continue to operate at LOS D or better, with the exception of the southbound ramp at the SR 99/French Camp Road (intersection 6). At this intersection, LOS would remain at F, and the delay would worsen from 10.0 seconds (see Table IV.B-4) to 10.2 seconds. According to County policy, measures must be identified to maintain the current LOS and delay value. The Caltrans traffic signal installation project,which would be operational prior to project approval, would improve operations at this intersection to an acceptable LOS B, and no further mitigation is required for the proposed project. This impact for the 2014 Expansion Project would be less than significant, and no mitigation measures are required (same as the previously proposed project).