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1,. MouNTAiN House PROPOsED MAcnADo TENTAnvE MAP 4. ENviRoNMENTAL CHe=sr 4.15 TKMSPORTAnON/heAPP[c L %W %, DISCUSSION REGARDING PROPOSED PROJECT %W a) Cause an increase in traffic which is substantial in relation to the existing traffic load `,. and capacity of the street system (i.e., result in a substantial increase in either the number of vehicle trips, the volume to capacity ratio on roads, or congestion at intersections)? and b) Exceed, either individually or cumulatively, a level of service standard established by the county congestion management agency or designated roads or highways? %W `, The proposed project includes 315 dwelling units housing approximately 900 residents. These residents would drive cars that would contribute to the traffic analyzed in the SPIIIEIR. Complete development of the residential land uses in Specific Plan III are �. projected to generate 1,595 morning(AM)peak-hour vehicle trips and 2,180 afternoon(PM) ` peak-hour trips(EDAW,2005b,Table 4.11-7). Specific Plan III includes 2,240 dwelling units housing approximately 6,100 people(EDAW, 2005a,Table 3-13). Since the proposed project would house approximately 900 residents,it is reasonable to assume that the residents .. of the proposed project would generate approximately 15 percent of these trips. The proposed project also includes 256,130 square feet(sf)of commercial and office space %W and 975,800 sf of limited industrial space located on the east side of the project site fronting Mountain House Parkway(Associated Engineering, 2006). Complete development of the commercial, office and limited industrial land uses in Specific Plan III are projected to generate 1,152 morning(AM)peak-hour vehicle trips and 1,329 afternoon(PM)peak-hour trips (EDAW, 2005b,Table 4.11-7). Specific Plan III includes 1,775,590 sf of commercial, office and limited industrial space(EDAW,2005a,Table 3-1). Therefore,it is reasonable to assume that people driving to and from these areas in the proposed project would generate approximately 69 percent of these trips. The transportation impacts of the Specific Plan III were analyzed in the context of cumulative projected growth in San Joaquin County by 2025. For this analysis,the estimated growth in the Mountain House Community at 2025 buildout was added to forecasts of housing and r. employment in the remainder of San Joaquin County and the surrounding region,including %, the nine-county Bay Area, the four-county Sacramento area,and Stanislaus County. Traffic improvements that were approved as part of the approval of Neighborhoods E,F,and G are considered part of the background roadway system in this analysis(EDAW,2005b). Table 4.15-1 presents the peak-hour trips that would be generated after the Mountain House Community is built-out in 2025. Approximately 45 percent of the peak-hour trips would be internal trips that originate and end within the Mountain House Community and 55 percent would be external trips that originate or end outside the Mountain House Community. 4-79