Models & groups

The following groups and teams, in alphabetical order, have contributed data to at least one iTEM intercomparison.

Some elementary methodology illustrates the diversity of iTEM participants:

  • Any model is built for an explicit purpose, which guides model design.
  • Models developed by groups over time also embed the evolving knowledge of group members.
  • Some groups operate a single model, whereas others operate multiple models representing aspects or parts of the broader transport–energy system.
  • Models differ in their coverage:
    • Integrated assessment models (IAMs) represent the entire economy, including non-transportation sectors. These models often represent the effect of greenhouse gas (GHG) emissions (from transportation and other sectors) on the climate.
    • Transport-focused models may include a stylized representation of the non-transportation sectors, or none at all.
    • Some transport-focused models are embedded in larger modeling frameworks, so include a soft link to (a) complementary economy-wide model(s).
  • Models differ in their resolution—the degree of disaggregation along multiple conceptual and physical dimensions.

A core activity of iTEM is to understand how these differences give rise to differing projections of measures that describe the same real-world system.

BP Energy Outlook

Emissions Prediction & Policy Analysis (EPPA)

ExxonMobil Outlook for Energy

Global Change Assessment Model (GCAM)

Global Energy System model (GET)

Global Transportation Roadmap

International Transport Forum

  • Group: ITF, Organization for Economic Co-operation and Development (OECD).
  • Leads: Jari Kauppila, Wei-Shiuen Ng.
  • Multiple models.
  • Participant since iTEM 1.

International Transportation Energy Demand Determinants (ITEDD)


  • Group: Energy Program, International Institute for Applied Systems Analysis (IIASA).
  • Lead: David McCollum.
  • Model website.
  • Participant since iTEM 1.

Mobility Model (MoMo)

Shell Scenarios

Statoil Energy Perspectives

Other participating organizations and individuals

Also in alphabetical order.

  • Institute for Transportation Studies, University of California, Davis (ITS-Davis).
    • Davis, CA, USA.
    • Representative: Lew Fulton.
  • IHS Automotive.
    • London, United Kingdom.
    • Representatives: Nigel Griffith, Tiffany Groode.
  • King Abdullah Petroleum Studies and Research Center (KAPSARC).
    • Riyadh, Saudi Arabia.
    • Representative: Nicholas Chase.
  • The Partnership on Sustainable, Low Carbon Transport (SLoCaT).
    • Representatives: Cornie Huizenga, Sudhir Gota.
  • Paul Leiby — Oak Ridge National Laboratory (ORNL), U.S. Department of Energy.
  • Andreas Schäfer — University College London (UCL).
  • Stanislav Sobolevsky — New York University (NYU).
  • Sonia Yeh — Chalmers University of Technology.

Organizing group

A small sub-group has organized the past iTEM workshops, developed the database and comparison workflow, and maintains this website.

  • Sonia Yeh
  • Lew Fulton
  • David McCollum
  • G. Page Kyle
  • Paul Natsuo Kishimoto

Contact us at Additional contributors are welcome.