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TABLE 1-1 SUMMARY OF IMPACTS AND MITIGATION MEASURES <br />Significant Impact <br />TRANSPORTATION AND TRAFFIC <br />TRAF-1A: The proposed Project would contribute to <br />unacceptable operation (from LOS C to LOS E in the AM <br />and PM peak hours) at the intersection of Doolittle Drive <br />and Marina Boulevard (#11) under baseline Plus Project <br />conditions. <br />TRAF-113: The proposed Project would contribute to <br />unacceptable operation (from LOS D to LOS E in the PM <br />peak hour) at the intersection of San Leandro Boulevard <br />and Marina Boulevard (#18) under baseline Plus Project <br />conditions. <br />Significance <br />Before <br />Mitigation <br />SAN LEANDRO SHORELINE DEVELOPMENT DRAFT EIR <br />CITY OF SAN LEANDRO <br />EXECUTIVE SUMMARY <br />Significance <br />With <br />Mitigation Measures Mitigation <br />TRAF-1A.1: Convert the existing eastbound right -turn lane on Marina LTS <br />Boulevard to a shared through -right turn lane to provide one left - <br />turn lane, one through lane and one shared through -right turn lane <br />on the eastbound approach. <br />TRAF-1A.2: Optimize the cycle length of the traffic signal at the <br />intersection of Doolittle Drive and Marina Boulevard (#11). The <br />traffic signal does not operate in coordination with any other signal; <br />therefore, the cycle length can be adjusted without affecting other <br />signals in the system. <br />TRAF-IB: Optimize the traffic signal timing splits at the intersection LTS <br />of San Leandro Boulevard and Marina Boulevard (#18). <br />TRAF-1C: The proposed Project would contribute to <br />S TRAF-1C: Install a modern mini -roundabout that could be LTS <br />unacceptable operation (from LOS A to LOS F in the AM <br />accommodated within the existing right-of-way. Research has shown <br />and from LOS B to LOS F in the PM peak hour) at the <br />that roundabout -controlled intersections have similar low frequency <br />intersection of Aurora Drive and Marina Boulevard (#10) <br />and severity of crashes as all -way stop -controlled intersections. <br />under baseline Plus Project conditions. <br />Further, the slower speed at roundabout also reduces the risk of <br />injuries and fatalities for road users in the event of a crash. A <br />conceptual drawing of a mini -roundabout is provided in Figure 4.13- <br />5. Implementation of this mitigation measure would improve the <br />operation of this intersection to LOS A in the AM, PM and Saturday <br />midday peak hours. Alternatively, installation of a traffic signal would <br />also mitigate the project impact as peak hour signal warrant is met. <br />Upon implementation, the intersection would improve to LOS B in <br />the AM peak hour and LOS A in the PM peak hour and Saturday <br />midday peak hour. <br />TRAF-1D: The proposed Project would contribute to <br />S TRAF-ID: Install a roundabout at the intersection of Monarch Bay LTS <br />unacceptable operation (from LOS A to LOS F in the PM <br />Drive and Mulford Point Drive (#19). <br />peak hour) at the intersection of Monarch Bay Drive and <br />Mulford Point Drive (#19) under baseline Plus Project <br />conditions. <br />LTS = Less Than Significant S = Significant SU = Significant Unavoidable Impact <br />PLACEWORKS 1-39 <br />