The Greenhouse Gas Strategic Transportation Energy Planning, or GreenSTEP, model was developed by 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 emissions. The Regional Strategic Planning Model, or 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 adopting GreenSTEP as the basis for their Energy and Emissions Reduction Policy Analysis Tool. In 2010, the American Association of State Highway and Transportation Officials 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.