The GreenSTEP model was developed by the Oregon Department of Transportation (ODOT) to estimate and forecast the long term effects of policies and other influences (e.g. gas prices) on the amount of vehicle travel, the types of vehicles and fuels used, energy consumption for vehicle travel and resulting greenhouse gas (GHG) emissions. The Regional Strategic Planning Model (RSPM) is a metropolitan version of the statewide GreenSTEP model being used in scenario planning efforts in various Oregon communities.
Evaluation of the GreenSTEP model at the national level lead to the Federal Highway Administration (FHWA) adopting GreenSTEP as the basis for their Energy and Emissions Reduction Policy Analysis Tool (EERPAT). In 2010, the American Association of State Highway and Transportation Officials (AASHTO) awarded ODOT staff its Presidents Award for Planning for the development of the GreenSTEP model. The family of GreenSTEP models is transitioning to the VisionEval Open Source Project common framework. Following is documentation for the GreenSTEP model:
GreenSTEP was designed to support strategic planning efforts which require the consideration of many possible long term scenarios and contingencies. It combines higher level analysis with an ability to compute the effects of a large variety of factors that influence vehicle ownership, use, energy consumption and greenhouse gas emissions.
The initial focus of GreenSTEP was on household travel using light duty vehicles. The household level model results and other GreenSTEP calculations can be used to calculate a wide variety of travel, energy, greenhouse gas, economic, and health measures. GreenSTEP's capabilities are being expanded over time to address household travel more completely and to address more portions of the transportation sector.
GreenSTEP is a statewide planning that is providing analytical support for a number of state planning purposes such as: