Design and Estimation of GreenSTEP and RSPM (March 10, 2016)


Date: March 10, 2016

Description: This is the second of three webinars on the GreenSTEP and RSPM strategic planning models. GreenSTEP is an open-source model that was developed at the Oregon Department of Transportation to enable state planners and policy makers to analyze the effects of alternative strategies for reducing greenhouse gas emissions from the transportation sector. The model was designed to address the many factors that affect travel and travel-related greenhouse gas emissions, and yet run relatively quickly so that analysts can run hundreds or thousands of scenarios in order to explore the decision space and test the robustness of policies to different conditions. The RSPM (Regional Strategic Planning Model) was developed from GreenSTEP to model metropolitan areas. These models operate in the middle ground between advanced travel demand models and simpler sketch planning tools. As with advanced activity-based models, GreenSTEP and RSPM model travel behavior using simulated households, but do so by modeling household travel as an aggregate quantity (i.e. annual vehicle miles traveled) rather than as daily tours. On the other hand, these models address a number of factors that are not typically considered by advanced travel demand models such as vehicle powertrains, fuel types, carsharing, and household travel budgets. This webinar will focus on the overall process used to develop parts of the models and will cover in more depth how selected sub-models were developed. Topics include:

  • Integrated model development process using R;
  • Data and data prep used in model development;
  • Development of DVMT model;
  • Development of light-weight vehicles model;
  • Development of the PHEV model;
  • Development of the household budget model; and
  • Development of the congestion model.

The following webinar will describe the new programming framework (VisionEval) that has been developed to facilitate collaboration in the further development of these and other strategic planning models.

PresenterBrian Gregor has over 35 years of experience in transportation and land use modeling, analysis, and planning. He is a registered professional traffic engineer in Oregon and has a master's degree in urban and regional planning from the University of Oregon. He has developed several innovative models, including the Greenhouse gas Strategic Transportation Energy Planning (GreenSTEP) model and the Land Use Scenario DevelopeR (LUSDR). He now operates his own consulting firm, Oregon Systems Analytics, which specializes in the development of models to support strategic planning to address transportation, land use, and related environmental issues.