GreenSTEP: Greenhouse Gas Statewide Transportation Emissions Planning Model

Global warming is likely one of the most serious and urgent issues facing the U.S. transportation sector. Major reductions in greenhouse gas emissions from the transportation sector will be needed in order to stabilize the climate and avoid the most serious effects of global warming. Travel models can play an important role in evaluating potential policies for reducing transportation sector greenhouse gas emissions. To do so, however, models will need to be expanded to address factors that are relevant to the management of greenhouse gas emissions. The GreenSTEP model was developed to fill this gap at a statewide level. The model combines household level modeling of vehicle types and usage with more aggregate level modeling of factors such as fuel types. The model is being used to assist in the development of a statewide strategy for reducing greenhouse gas emissions from the transportation sector in Oregon.