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City of San Leandro Proposed Guidelines for Analyzing VMT December 8, 2023 Page 5 of 12 surrounding uses, a commercial development with a drive-through window, or a project without easy access to transit service and minimal pedestrian or bicycle infrastructure) 3. Estimating VMT A project not excluded from VMT analysis through the screening process described above shall be subject to a VMT analysis to determine if it has a significant VMT impact. The most common method of calculating VMT metrics is through a travel forecasting model. A travel forecasting model uses specialized software and is designed to reflect the interactions between different land use and transportation network elements in a large area. The travel model most applicable in the City of San Leandro is the Alameda CTC Countywide Travel Demand Model. The Alameda CTC Model is regularly updated and validated, and it contains a script that calculates estimates of VMT per resident and VMT per worker for all the Transportation Analysis Zones (TAZs) in the Model. The City of San Leandro proposes to use the Alameda CTC Model as the primary source of information for VMT forecasts for projects in San Leandro. If the project is a small, single-use project that is similar to other developments that already exist in that TAZ, then it may be concluded that the project generated home-based VMT per resident or the home-work VMT per worker will be the same as the existing VMT per resident or per worker in that TAZ; in that instance, no new model run should be required. If the project is small, single-use project and only slightly different than the existing uses in the project TAZ (such as a residential development with a slightly higher or lower development density in a primarily residential area), then the Alameda County VMT Reduction Calculator Tool can be used to adjust the available VMT metrics for that TAZ to better reflect the VMT for the project. However, a new run of the Alameda CTC Model should be conducted in the following circumstances: •The project is large enough to affect regional trip-making; generally generating more than 2,000 daily trips and/or 300 peak hour trips (generally corresponding to about 210 single-family dwelling units, 425 mid-rise multi-family dwelling units, or about 180,000 square feet of office) •The project is very different from the existing land uses in the TAZ (i.e., new residential development in a TAZ without any existing residential development) •The project more than doubles the amount of a given land use in the TAZ, even if it would not generally be considered a regionally significant project