The Transport Task Group (TTG) was established by the G20 in order to:

  • Build domestic support and enhance capability for action to reduce the energy and environmental impacts of motor transport, especially heavy‑duty vehicles (HDVs).
  • Identify and exchange best practices among G20 countries on the implementation of cost‑effective energy efficiency and emission control measures in the transport sector.
  • Conduct analysis and outreach to assess the opportunities, barriers, costs and benefits of HDV energy efficiency action, and subsequently recommend a course of action for participating G20 countries.

Why does transport matter for energy efficiency?


Leading members: the European Commission and the United States.
Participants: Argentina, Australia, Brazil, Canada, China, Germany, India, Italy, Japan, Me , Russia and the United Kingdom. Implementing organisations include the International Council on Clean Transportation (ICCT) and the Global Fuel Economy Initiative (GFEI). 

Recent developments

 In 2017, the TTG continued its eforts to facilitate knowledge-sharing and build capacity to support the expanded adoption of world-class standards for HDVs. This was primarily achieved by:

  • Hosting policy exchanges with leading members of the international transport community, including on lessons learned from the European Union’s Real Driving Emissions programme and latest developments in U.S. HDV policies. • Publishing a report on the status of policies for clean vehicles and fuels in select G20 countries. The report builds on an earlier assessment by the TTG of the impacts of world class vehicle efciency and emissions regulations in G20 countries, which was released in 2016. • Setting up a work stream on technical and policy deep dives to inform research and policy formulation at the domestic and international levels. As part of this work the task group initiated a landmark project in late 2017 focusing on the technical aspects of HDV fuel economy standards. The project aims to accelerate the development and implementation of HDV regulations in interested countries.

  • Conducted a survey of participating countries on their institutional needs and technical challenges to inform the development of Policy Roadmaps, which will outline future policy and programmatic improvements to reduce the energy and environmental impact of motor vehicles, especially HDVs.

  • Developed a report (Impacts of World-Class Vehicle Efficiency and Emissions Regulations in Select G20 Countries) which evaluates the impacts of implementing world-class efficiency and emissions standards in TTG countries, in line with the G20 Energy Efficiency Leading Programme.

  • Led policy exchanges on experiences and best practices on key issues, including compliance and enforcement, sustainable alternative fuels, global efforts to implement low-sulphur fuels, and domestic experience in the EU and Me .

In addition, the TTG drafted and secured strong language in the G20 Energy Efficiency Leading Programme that included first-ever multilateral acknowledgement and definition of “world class” clean fuel and vehicle standards. Defining “world class” standards is essential for assessing the possible impact of such standards and driving further policy action. Analysis by one of the TTG’s implementing organisations, the ICCT, revealed that implementation in TTG countries alone of these “world class” standards could reverse the growth of transport emissions and avoid multiple gigatonnes of CO2 emissions per year in 2040 compared to a currently adopted policy scenario.


The latest publications for this task group can be found on the Publications page.

Further information