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4.7 – Transportation Draft Environmental Impact Report February 2021 14800 W. Schulte Road Logistics Center 4.7-8 • Regional Retail (>50,000 square feet): Total VMT per service population for trips taken by both workers and visitors. • Mixed-Use: Total VMT per service population. • Other: Total VMT per service population for trips taken by both workers and visitors. The County does not have established VMT thresholds; however, a draft of the County’s VMT Thresholds Study recommends a similar approach to that provided in the OPR Technical Advisory (County of San Joaquin 2020a). OPR recommends a 15% reduction from baseline VMT per capita or per employee for residential and work projects, respectively (OPR 2018). The Project is a warehousing land use and therefore is an employment project. Therefore, home-based work (HBW) VMT per employee metric was used in the assessment of VMT impacts. The San Joaquin Council of Governments (SJCOG) Regional Travel Demand Model (RTDM) was updated in December 2019, with a base year of 2015 and a forecast year of 2045. HBW vehicular trips were selected for evaluation in the County’s VMT Threshold Study to estimate trips associated with work VMT and estimate an average HBW VMT per employee (County of San Joaquin 2020a). The VMT Thresholds Study recommends 16.19 VMT per employee as a threshold for VMT impacts, 15% below the County’s average HBW VMT per employee. Although the VMT trips evaluated in the SJCOG RTDM would not be expected to change because baseline model data is static, the California Statewide Travel Demand Model (CSTDM) was also used in this analysis because the County’s VMT Threshold Study has not yet been adopted. The CSTDM is a statewide model; therefore, it contains larger traffic analysis zones (TAZs) compared to regional models and provides a high-level VMT analysis. The CSTDM has a base year of 2010, with a forecast year of 2040. Based on data provided in the CSTDM for San Joaquin County, 15% below the County average home-based work VMT per employee is 12.27. The Project would be considered to have a significant impact if the Project VMT per employee is greater than 16.19 per the SJCOG RTDM, and 12.27 per the CSTDM. Table 4.7-1 summarizes VMT per-employee thresholds from both models. Table 4.7-1. VMT Threshold Summary SJCOG RTDM1 CSTDM2 VMT per Employee Regional Average (San Joaquin County) 19.05 14.43 15% below San Joaquin County 16.19 12.27 Notes: VMT = vehicle miles traveled; SJCOG = San Joaquin Council of Governments; RTDM = Regional Travel Demand Model; CSDTM = California State Transportation Demand Model. 1 Figure A.7 of the Draft County of San Joaquin VMT Thresholds Study (County of San Joaquin 2020a) 2 CSTDM TAZ excel spreadsheet (Caltrans 2015) The Project’s VMT analysis is provided under Threshold B. Hazardous Features (Project Access) The analysis evaluates whether the Project would result in hazards due to design features by determining appropriate acceleration and deceleration lane lengths, analyzing proximity of Project driveways to other driveways, driveway throat depths, and truck access. A significant impact would occur if truck traffic would not be able to navigate the site due to insufficient driveway widths or curb radii, locations of Project driveways would interfere with nearby driveways, or if vehicle queueing would impact on- or off-site vehicle operations.