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4.Written Comments on the Draft EIR and Responses to Comments <br /> The implementation of both Mitigation Measure 4.D-lc and Mitigation Measure 4.D-ld would <br /> reduce this impact to a less-than-significant level. Mitigation Measure 4.D-1d would include the <br /> following: <br /> • On the northbound 1-680 off-ramp at Stoneridge Drive,the construction of a northbound <br /> right-turn overlap phase; <br /> • Construction of a second southbound left-turn lane from Johnson Drive to Stoneridge <br /> Drive; <br /> • Extension of the existing westbound right-turn pocket from Stoneridge Drive onto Johnson <br /> Drive for approximately 800 feet; and <br /> • Construction of a second on-ramp lane onto northbound 1-680 from the westbound <br /> Stoneridge Drive approach, which requires the reconstruction and widening of the existing <br /> on-ramp bridge. <br /> As stated above,the review and approval process for one part of Mitigation Measure 4.D-I d—the <br /> construction of a second on-ramp lane onto northbound 1-680 which would necessitate bridge <br /> widening and reconstruction—would require Caltrans approval which is not under the control of the <br /> City of Pleasanton,and therefore this impact has been classified as significant and unavoidable, <br /> because its implementation cannot be assured at this time.The mitigation measure is logistically <br /> feasible, however,and the City continues to work with Caltrans and other agencies to ensure <br /> completion of the measure to the extent possible.As stated above, regardless of the involvement of <br /> other agencies,the City is required to ensure implementation of traffic mitigation measures prior to <br /> operation of uses in the area of the EDZ that would result in the impacts. <br /> Impacts on Mainline 1-680 Freeway Segments <br /> Some comments expressed concern regarding increased congestion on 1-680 that could result <br /> from the proposed EDZ. Traffic conditions on 1-680, and impacts to those conditions that would <br /> result from the proposed EDZ, are addressed under Impact 4.D-4 in the Draft SEIR(page 4.D-50). <br /> As described in the Draft SEIR, the addition of traffic from implementation of the proposed EDZ <br /> would slightly worsen the operations of northbound and southbound 1-680 traffic, but would <br /> neither cause deficient operations nor increase the freeway volume by more than the 3 percent <br /> threshold of significance. Therefore, the impact to mainline freeway conditions would be less <br /> than significant, and no mitigation related to impacts of the proposed EDZ was determined to be <br /> required. <br /> No widening of 1-680 would be associated with any of the proposed EDZ's mitigation measures. <br /> Installation of New Traffic Signals on Johnson Drive <br /> Some comments expressed concern that the installation of up to three new traffic lights along <br /> Johnson Drive, as required by some traffic mitigation measures, could increase vehicle delays. <br /> The installation of new traffic lights as proposed for the EDZ would help reduce congestion that <br /> could occur from the increase in traffic cause by Phase 1 and full huildout. <br /> Johnson Drive Economic Development Zone 4-10 ESA/140421 <br /> Supplemental EIR Response to Comments March 2016 <br />