RES 00114A - Laserfiche WebLink

Mitigation Monitoring and Reporting Program J. Transpottation Page 47 TRANSPORTATION Mifigatioo Measure: J26. Improve the I-6S0 southbound offramp when traffic volume on the ramp exceeds 1,440 vehicles per lane per hour or operation of the 1-680/Bernal Aveuue intersection reaches LOS E, subject to a reimbursement agreement with the City of Pleasanton; if the CiTy has sufficient funds available when the improvement is needed, then the project sponsor may fund only the project's fair share of the improvement. Impact to he Mitigated: Project traffic would contribute to traffic volumes at the ]-680 NB onramp and SB offramp, contributing to unacceptable ramp service levels during the AM and PM peak hours. AgencyQndividual Responsible for Implementation: Site developer and City of Pleasanton, Public Works Department Implemenmtioo Timing: Monitoring to begin upon completion of first building. Improvement [o be undertaken when traffic volumes exceed 1,440 vehicles per lane per hour. Mitigation Specifications: Three alternative ramp improvements [ha[ could be implemented to miti- gate project traffic were presented in the DEIR (Figure 27, p. 199). This MMRP anticipates that Alternative 3 will be implemented. Mitigation specifications describing the lane geometry of the improved interchange could be modified (eg., to select one of the other alternatives or a new alternative) without affecting the sequence of actions for mitigation described below. The ramp improvement project [o be selected for Measure J26 is subject to Caltrans review and approval, including additional CEQA review as part of a PSR process. Physical Characteristics of Alternative 3 Alternative 3 is a partial cloverleaf design, including a new southbound offramp from I-680 intersecting Bernal Avenue a[ a signalized intersection. The offramp would provide for three left-mrn lanes for eastbound Bernal Avenue traffic and one right-turn lane for westbound Bernal traffic. A southbound loop onramp to I-680 would be provided for westbound Bernal Avenue. The existing direct onramp for eastbound Bernal Avenue traffic taming right onto the freeway would be maintained.