FTA's Transit Greenhouse Gas Emissions Estimator v3.0
The Transit Greenhouse Gas (GHG) Emissions Estimator (Estimator) is a Microsoft Excel-based spreadsheet tool that allows users to estimate the partial lifecycle GHG emissions generated from and the energy used in the construction, operation, and maintenance phases of a project across select transit modes. Users input general information about a project, and the Estimator calculates annual GHG emissions by project phase.
The tool was developed in connection with the Greenhouse Gas Emissions from Transit Projects Programmatic Assessment. The tool provides a resource to generate coarse but informative estimates of GHG emissions using limited project information and can be used for a broad range of transit projects. This tool is not mandatory; transit agencies should work with the appropriate FTA regional office to determine whether to conduct project-specific analyses of GHG emissions and the best approaches.
Refer to the accompanying Transit Greenhouse Gas Emissions Estimator v3.0: User Guide for detailed instructions on how to use the tool. The User Guide also provides information on the GHG emission factors, data sources, and assumptions used in the tool.