Sustainable Transportation Energy Pathways (STEPS)
Mishra, Gouri Shankar, Page Kyle, Jacob Teter, Geoffrey M. Morrison, Son Kim, Sonia Yeh (2013) Transportation Module of Global Change Assessment Model (GCAM): Model Documentation. Institute of Transportation Studies, University of California, Davis, Research Report UCD-ITS-RR-13-05
The Institute of Transportation Studies at the University of California, Davis and Pacific Northwest National Laboratory (PNNL) embarked on a project to update and refine the transportation module of the Global Change Assessment Model (GCAM, formerly MiniCAM) – an integrated assessment model developed and maintained by PNNL.
The project encompasses the following four refinements to the transportation sector of GCAM:
- Increased resolution to include the full spectrum of sub-modes and technologies available in passenger and freight transport
- Refined estimates of input parameters so as to better represent real-world heterogeneity in a way consistent with the latest literature on transportation
- Refined estimates of base year (2005) estimates of transportation demand, and disaggregation of IEA energy estimates between modes and size classes
- Included the non-motorized modes of walking and biking
This project aims to better represent the heterogeneity and flexibility in the transport system to allow the modeling of a broader range of transport policy instruments including subsidies to public transit, government incentives for alternative technology, transportation fuel taxes, and public investments to increase the speed, service frequency/availability, and comfort of public and non- motorized modes.
This publication provides methodological detail on the new GCAM Transportation Module and contains the following:
- Descriptions of the new transportation module in GCAM
- Details about the data sources and methodology adopted to estimate the exogeneous input â€¨parameters
- A summary of the region-specific transportation data for base year (2005)
- Comparisons of these estimates across regions and modes
- Highlights of the uncertainty and shortcomings in our estimates