Appendix H - Transportation Supporting Information COMBINED

4 criteria, such as being located in a low-VMT area, or meeting proximity-to-transit requirements. Hidden Canyon Residences & Preserve project is not located in a low VMT Area and is not within walking distance of high-quality transit. The project does not qualify for transit or low-VMT area screening exemptions, and due to its relatively low density and limited access to active or transit modes, it does not meet the criteria for project type screening either. Therefore, a full VMT analysis was conducted. SIGNIFICANT IMPACT CRITERIA In accordance with Senate Bill 743 and the California Office of Planning and Research (OPR) Technical Advisory on Evaluating Transportation Impacts in CEQA (2018), residential projects must be evaluated based on their VMT per capita. The OPR guidance recommends that a residential project may have a significant transportation impact if it generates VMT per capita 15 percent below the existing average which equates to 85 percent of the VMT per capita. The City of Pleasanton has not adopted formal VMT thresholds of its own, but the City’s 2023–2031 Housing Element Draft EIR applied the OPR- recommended 15 percent reduction standard to the Alameda County average when evaluating the significance of VMT impacts. Projects exceeding this threshold are considered to have a significant impact under CEQA. Accordingly, this analysis uses the Alameda County average residential VMT per capita as the baseline, in alignment with the City’s Housing Element EIR methodology. This ensures consistency in evaluating cumulative VMT impacts associated with residential development anticipated in the Housing Element. The primary metric used is Residential VMT per capita (i.e., per resident), consistent with CEQA. Total Residential VMT within the project TAZ was divided by the projected population to estimate VMT per capita. This value was then compared to the Alameda County’s average VMT per capita, reduced by 15 percent, which serves as the significance threshold. Further, the Alameda County VMT Reduction Estimator Tool (https://www.alamedactc.org/wp-content/uploads/2021/09/AlamedaCTC_VMT_Final_Tool_20210826. xlsx) was also used to evaluate potential VMT mitigation. Table 1: Land Use Changes for Plus Project Scenarios TAZ Households Population (Residents) Single Family Dwelling Units 1190 +28 +78 +28 VMT IMPACT FINDINGS Baseline Impact Findings Table 2 shows the VMT per Capita associated with the proposed development, derived from the ACTC model outputs for TAZ #1190, which includes the proposed development. Under both Existing and Existing plus Project conditions, the VMT per Capita is higher than the significance threshold of 16.47 miles per resident that is applicable to Existing plus Project conditions. This represents a required reduction of approximately 52.70 percent to achieve compliance. As such, the residential component