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Analysis OVERALL PROJECT DESCRIPTION Physical Description: The new community of Mountain House includes 4,791 acres or about 7yz square miles of area and is located in southwestern San Joaquin County.The boundaries of the Mountain House are Interstate 205 on the south, Old River on the north,the Alameda County line on the west and Mountain House Parkway and Wicklund Cut on the east. The city limits of Tracy are about 3'/2 miles to the east, and the City of Livermore is approximately nine miles to the west. Background: Trimark Communities, the principal developer of Mountain House, is requesting amendments to the General Plan, Master Plan, and Specific Plan I regarding the number of through lanes on various segments of Mountain House Parkway. The amendments are needed in order to achieve consistency between these documents and to reflect recent and previous plan approvals for Mountain House Parkway. The proposed Master Plan change regarding pedestrian through-block connections is proposed to resolve potential traffic safety and Master Plan policy conflicts that have resulted from the application of the through-block pedestrian pathway policy in Neighborhood "F". Amendments to the Neighborhood "F" Special Purpose Plan are being proposed to achieve consistency between the proposed Neighborhood "F" major subdivision application, SU-00-03, and the Special Purpose Plan. Analysis: The changes proposed for Mountain House Parkway are based on, and supported by, previous and recent traffic model runs provided to the County and the Mountain House Community Services District.The traffic model runs indicate that 4 through lanes from Byron Road to Mascot Boulevard,6 through lanes from Mascot Boulevard to Von Sosten Road,and 8 through lanes from Von Sosten Road to 1-205 would: 1) be adequate to accommodate the traffic volumes anticipated on Mountain House Parkway at buildout;and 2) provide a more logical transition in the number of through lanes on Mountain House Parkway from 1-205 to Byron Road than that currently specified by the Master Plan. The amendmentto Policy 3.4.2(o)of the Master Plan concerning pedestrian through-block connections is supported by staff since it would enable the Community Development Director to determine when a proposed pedestrian pathway is appropriate or not, based on considerations of public health,safety,and welfare. This change is particularly relevant to the tentative subdivision map for Neighborhood F. Under the current policy,a mandatory pedestrian through-block connection would be required on the north side of the proposed Wicklund Elementary School,along Legacy Drive,since the block exceeds 800 feet in length. A pedestrian through-block connection here, however,would put children at risk since this midblock location is the principal entrance/drop- off/pickup point for the school.The proposed revised language for Policy 3.4.2(o) is as follows: 5