The ICCT is unique in the transportation and environmental sectors because . . .

We convene

We bring together global policymakers, stakeholders, and experts to facilitate solution-orientated conversations and collaborations.

Transatlantic Summit
India Clean Transportation Summit
Digital events & webinars

We analyze

We research key facets of the clean transportation transition and produce definitive analyses of policies, technology, and trends.

Global Automaker Rating
Life cycle analyses
• Cost Analysis

We envision

We model and define ambitious yet feasible policies and technologies for decarbonizing transportation by 2050.

Vision 2050 series

We monitor

We monitor global progress of the clean transportation transition by tracking policies and impacts.

• Annual EV Update
Market Monitor
Phase-in maps
EU Pocketbook

We demystify

We translate the complicated issues underpinning the clean transportation transition.

Explainer videos
Lab to Road series
• Well to Wake series
• Real-world series
Google’s Travel Impact Model (TIM)


The transportation sector already accounts for approximately 25% of global anthropogenic CO2 emissions. Still, global demand for transportation is surging, and with it, inexorably, carbon emissions—not to mention other forms of air pollution. Transforming the technologies and systems that move people and goods around the world is an urgent imperative.

Now, in little more than a generation, we must radically change a sector that almost exclusively depends on a single energy source—petroleum—operating on infrastructure that represents trillions of dollars of investment over decades. Governments around the globe—at every level—must implement ambitious policies that will accelerate the transition to clean transportation technologies and systems. That’s our focus.


We have less than 15 years to cut global CO2 emissions in half, and 30 years to get to net zero if we want any chance of limiting global warming to 1.5 degrees Celsius. As we work toward that mission, we envision a future where leaders around the globe use the ICCT’s expert research and technical support to develop ambitious, coordinated policies to eliminate air and climate pollution from transportation, consistent with limiting warming to well-below 2°C and pursuing efforts to limit warming to 1.5°C this century.

We take pride in our contributions to regulation and policy victories that have influenced environmental and transportation policies worldwide. These accomplishments reflect our dedication to providing high-quality, impartial, and timely research and technical analyses.

Urban bus fleet transition

In 2018 we embarked on a project to realign urban bus and municipal fleets in five megacities (São Paulo, Mexico City, Jakarta, Hainan, Bangalore) towards a soot-free, low-carbon pathway to improve air quality and reduce the climate impact of public transportation systems​​. [Read more]

Informing emissions policy

Our research into heavy-duty vehicle emissions in the US and EU revealed significant discrepancies in real-world nitrogen oxide (NOx) emissions due to policy design flaws, prompting regulatory changes, notably in California, with expectations of similar federal actions in throughout the US​. [Read more]

FUMES makes headlines

In a global first, the ICCT used drones and helicopters to gather the most comprehensive dataset of real-world methane emissions from ships. Our findings have given policymakers the data they need to strengthen regulations to limit marine emissions and slash pollution. [Read more]

Award winning analysis

Our efforts in uncovering the Volkswagen emissions scandal, Dieselgate, led us to winning the 2017 Climate and Clean Air Award for Transformative Action, underscoring the significant impact to substantial reductions in NOx emissions and associated health benefits​. [Read more]


The International Council on Clean Transportation (ICCT) is an independent nonprofit research organization founded to provide exceptional, objective, timely research and technical and scientific analysis to environmental regulators.

Our work empowers policymakers and others worldwide to improve the environmental performance of road, marine, and air transportation to benefit public health and mitigate climate change.

We began collaborating and working as a group of like-minded policymakers and technical experts, formalizing our status as a mission-driven non-governmental organization in 2005.


The principles of justice, equity, diversity, and inclusion underpin the ICCT’s work. The ICCT is proud to be both a leader in technical expertise and in employee satisfaction. We are proud to be named a 2023 Winner for the “Best and Brightest Companies to Work for in the Nation” by Best and Brightest.


The ICCT employs professionals, woking hybrid and remotely, in Beijing, Berlin, New Delhi, São Paulo, San Francisco, and Washington, D.C. offices, including fully remote staff in Indonesia, Colombia, Vietnam and Mexico. Our engineers, chemists, biologists, physicists, communicators, policy experts, economists, and operationalists working side-by-side with policy makers to provide relevant, rigorous, unbiased research and technical and scientific analysis to government officials internationally. Support from foundations and governments drives that work. We thank our recent funders, including:

Aspen Global Change Institute
Clean Air Fund
Climate Imperative Foundation
ClimateWorks Foundation
The David and Lucile Packard Foundation
Energy Foundation
European Climate Foundation
FIA Foundation for the Automobile and Society
Heising-Simons Foundation
Pisces Foundation

Quadrature Climate Foundation
Sequioa Climate
Mercator Foundation
Blue Horizons Fund
United Nations Environment Programme
The William and Flora Hewlett Foundation