The U.S. has pledged to reduce greenhouse gas (GHG) emissions 26-28 percent by 2025 and 80 percent or more by 2050. The transportation sector is a significant source of U.S. GHG emissions, and will need to reduce energy use and transition to alternative energy sources in order to support national climate commitments. FHWA is working with states and metropolitan areas to integrate GHG reduction analysis into transportation planning, deploy infrastructure needed for low carbon fuels, reduce GHG emissions in construction and maintenance practices, and improve system and travel efficiencies. See more in Background on transportation GHGs and Toward Low Carbon Transportation - summary of FHWA work and what transportation agencies can do.
Transportation Planning - FHWA has a number of resources to help integrate greenhouse gas and energy considerations into the transportation planning process. Resources include guidebooks on estimating GHGs, GHG reduction strategies, GHG performance metrics, scenario planning, and integrating GHG considerations at each planning stage.
Analysis Tools - FHWA's Energy and Emissions Reduction Policy Analysis Tool (EERPAT) is a state-level modeling system to evaluate strategies to reduce emissions. It is sensitive to a number of strategies such as pedestrian, public transit, and system efficiency, that are difficult to analyze using travel demand models. FHWA's Infrastructure Carbon Estimator (ICE) evaluates GHGs from construction and maintenance of transportation facilities as well as strategies to reduce these emissions.
Alternative Fuels & Energy - Under a pooled fund initiative led by the Oregon DOT, FHWA and eight state DOTs are implementing a series of workshops around the country and developing a web-based alternative fuels toolkit. FHWA has also sponsored research on electric vehicles and conducted a study on electric vehicle deployment implications for transportation agencies.