3A Public Hearing 2010 0503 - Laserfiche WebLink

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When traffic generated by Phase 1 of the Kaiser Medical Center is added to the roadway network, including the planned roadway changes and project improvements described above, only one nearby intersection would be adversely impacted — the intersection at the Marina Boulevard/Merced Street. Mitigation: Mitigation of this traffic impact requires implementation of an adaptive traffic signal system, not just at this intersection but at all of the signals along the Marina Boulevard corridor between Merced Street and Alvarado Street, and along the Merced Street corridor between Marina Boulevard and Fairway Drive. An adaptive traffic signal system allows for the modification of signal cycle lengths and optimized actuated signal phasing sequence and timings for the corridor. An adaptive traffic signal system required additional hardware to be added to each of the signals along these corridors. Such a system would improve traffic operations at the Marina Boulevard/Merced Street intersection. The mitigation measure requires the project sponsors to contribute a fair share sum towards this adaptive traffic signal system. (MM TR -1.1) Implementation of an adaptive traffic signal system at the freeway on- and off -ramps on Marina Boulevard (intersections that are part of the interconnected signal corridor) would require approval by Caltrans. Although the City does not foresee a problem with Caltrans' acceptance of these improvements, the City cannot guarantee Caltrans' acceptance. As such, impacts to the Marina Boulevard/Merced Street intersection remain significant and unavoidable. Traffic Impacts - Existing plus Phase 1 of the Medical Center plus the Mixed -Use Retail Development Traffic associated with development of Phase 1 of the Kaiser Medical Center together with the Mixed -Use Retail Development would cause sub -standard levels of service at the Marina Boulevard/Merced Street intersection and create operational issues associated with queuing at the intersection at Republic Avenue/Merced Street. Mitigation: To mitigate traffic impacts at the Marina Boulevard/Merced Street intersection, a new signalized driveway into the northern portion of the Mixed -Use Retail Development project site along Marina Boulevard between the I-880 southbound ramps and Merced Street is required. This new signalized driveway would permit both left and right turns in from westbound and eastbound Marina Boulevard, providing a new access point to the project site and thus diverting a portion of traffic away from the Marina Boulevard/Merced Street intersection. Vehicles exiting the project site from this new driveway onto Marina Boulevard would be restricted to right turns only. In order to prevent additional on-site impacts to the Mixed -Use Retail Development associated with the new driveway and entrance roadway, a 60 -foot wide driveway and roadway width with parking restrictions on either side would be required. The mitigation measure requires the project sponsors to contribute fair -share funds towards this improvement. (MM TR -1.3) • Mitigation: To mitigate queuing impact at the Republic Avenue/Merced Street intersection, required improvements include widening the north leg of the intersection Planning Commission Staff Report April 22, 2010 Kaiser Permanente San Leandro Medical Center and Mixed Use Retail Development Project Page 9 of 28