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4.Approach and Scope of Work on information in the Manteca Northwest Airport Way Master Plan Draft EIR(Appendix J: Final Transportation Impact Study).The following 3 I- 5 segments will be analyzed: Mathews to Roth; Roth to Lathrop; and, Lathrop to Louise Ave.No new traffic counts or calculations of existing LOS are proposed. However, if it is determined that additional LOS calculations are desired,all basic freeway and ramp merge-diverge operations will be analyzed based on procedures described in the Highway Capacity Manual,2000. • Describe the existing street and highway network and traffic conditions in the vicinity of the site,using existing data and field reconnaissance. • Establish significance criteria that will be used to judge project and cumulative impacts, using LOS standards identified in the County's General Plan. • Estimate the trip generation and trip distribution characteristics for the proposed project for daily and AM/PM peak-hour conditions for Phase I and Phase H additions on the basis of existing patterns and proposed changes to those patterns. • Calculate existing plus project(Phase 1)levels of service for the study intersections,freeway mainline segments and ramp junction,and identify significant project impacts. Existing plus project intersection operational analyses will include 95th percentile queue estimates relative to left turn storage requirements based on the Highway Design Manual(6th Edition). Future year intersection analysis will be performed using SYNCHRO-7 software and basic freeway and ramp merge-diverge based on procedures described in the HCM 2000.All truck traffic will be converted to passenger car equivalents prior to performing operational analyses. • Estimate traffic volumes at the study intersections to serve as the basis for judging project impacts under Phase I plus Phase 11(2020) conditions.These baseline volumes will be derived by the use of traffic growth factors(obtained from the County).It is assumed that the traffic growth factors will account for development that is reasonably foreseeable to be built and occupied by 2020.The FURNESS procedure (NCHRP-255)will be used to adjust and grow turn movement counts to reflect future traffic growth at approaches as estimated by the SJCOG model or as provided by the County. • Calculate 2020 Baseline plus project(Phase I plus Phase II) levels of service for the study intersections, freeway mainline segments and ramp junction, and identify significant project impacts. Future year intersections operational analyses will include 95th percentile queue estimates relative to left turn storage requirements based on the Highway Design Manual(6th Edition). Future year intersection analysis will be performed using SYNCHRO-7 software and basic freeway and ramp merge-diverge based on procedures described in the HCM 2000. All truck traffic will be converted to passenger car equivalents prior to performing operational analyses. 1-14 San Joaquin County—EIR for the Union Pacific Modernization Project