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Draft Environmental Impact Report p p Page IV.13-21 Forward Inc. Landfill Expansion Mitigation Measure B.1. Adding a second left turn lane to the north to west bound traffic would improve the delay in that direction,"but the intersection as a whole would still have unacceptable LOS E. Adding a third left turn lane to the east to north traffic would improve the LOS to an acceptable level;however,there would need to be one or two other eastbound lanes for the other traffic movements. This would result in an impractically,wide intersection, in which turning movements would be awkward and unsafe, long vehicle queues would form, and pedestrian safety would be diminished. For these reasons, a triple turn lane is rejected by City policy, and the deterioration of LOS at this intersection was deemed to be a significant and unavoidable impact. Therefore, no mitigation measures are available to reduce this impact to a less-than-significant level. Impact B.2. Unacceptable Travel Speed on Northbound Austin Road During the PM Peak Under Cumulative Plus Project Conditions. Table IV.13-12 shows the results of the road segment evaluation for Cumulative(year 2035) conditions. Under cumulative-plus-project conditions,the segment of Austin Road between Arch Road and the project driveway would operate acceptably at LOS B or better,with the exception of northbound travel during the PM peak. This segment would operate at LOS F, with a speed of 29.9 mph, during the PM peak. This would be caused by the long delays at the Austin Road and Arch Road intersection. Since the project would add to the traffic volume at this segment, this impact is considered potentially significant. Table IV.B-12 AUSTIN ROAD (ARCH ROAD TO PROJECT SITE DRIVEWAY) ROADWAY SEGMENT ANALYSIS- CUMULATIVE 2035 SCENARIOS LOS (Spee in mph) Scenarios Segment AM PM DescriptionNB SB NB SB 035 Cumulative, No Project Two-Lane B(41.7) A(45) B(34.5)I A(45) 035 Cumulative Plus Project Arterial B(41.7) A(45) F(29.9)' A(45)11 Notes: 'With construction of a second northbound left turn lane at Arch Road, the speed would increase to 32.1 mph,LOS F. With addition of a second northbound left turn lane at Arch Road,the speed would increase to 32.1 mph,but remain at LOS F. As discussed in Cumulative Intersection Operations Deficiencies, above, City policy does not allow implementation of measures that would improve LOS at this intersection to an acceptable level (LOS D or better). Therefore, the project's contribution to the unacceptable travel speed on Austin road would remain a significant unavoidable impact. Mitigation Measure B.2. No mitigation measures are available to reduce this impact to a less- than-significant level. Impact B.3. Potential Impacts at Main Access Driveway. The Forward Landfill access driveway is study intersection No. 3 (see Figure IV. B-1). Austin Road is currently one lane in each direction and does not have left turn pockets where it