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With nearly 250 million light duty vehicles on the road, the United States has the largest vehicle fleet in the world, and annual new vehicle sales second only to China.

Despite its historical role in pioneering vehicle regulations, from the mid-1980s until very recently the U.S. lagged behind other developed nations in passenger vehicle fuel economy standards and emissions regulations (see the global PV standards update), with higher levels of CO2 emissions per mile, higher average fuel consumption, and lower average fuel economy. However, since 2009 the United States has adopted aggressive legislation that could make the country a global leader in fuel efficiency and GHG emissions control. And market demand for fuel-efficient gasoline, hybrid, and electric vehicles is growing.

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Recently Released

Status of policies for clean vehicles and fuels in select G20 countries
Reveals that the efforts made by multiple Transport Task Group (TTG) countries to promote and support policies and programs—including stringent tailpipe emissions standards, fuel economy standards, low sulfur fuels, and green...
Briefing
New mobility: Today's technology and policy landscape
A summary of the technology and policy landscape encompassed by the phrase "new mobility," and survey of considerations involved in ensuring that new mobility developments support and advance the goals of clean transportation.
White paper
How rapeseed and soy biodiesel drive oil palm expansion
Examines the link between soybean and rapeseed biodiesel and palm oil in light of a new study on substitution effects.
Briefing
 

From the ICCT Blogs

Maximizing aircraft fuel efficiency: Don’t skimp on R&D
An interview with Dr. Fay Collier, Associate Director for Flight Strategy, Integrated Aviation Systems Program at NASA Aeronautics and a former Project Manager at NASA Environmentally Responsible Aviation (ERA), on NASA’s contribution to technologies already in use on aircraft flying now, the ERA project, and a new NASA initiative to demonstrate these environmentally responsible aviation technologies. 
Staff Blog
New energy efficiency target for cars could help Brazil compete in international markets
Aligning Brazil's new-car efficiency target with the European Union’s target would have substantial benefits for consumers. Compared to a car meeting Inovar-Auto's 2017 target, the average new car sold in 2023 could reduce fuel costs more than 4,000 USD over the lifetime of the vehicle, equivalent to 2.4 times the cost of additional vehicle technology.
Staff Blog
Maximizing aircraft fuel efficiency: Engines matter
A conversation with Dr. Meyer (Mike) J. Benzakein on the importance of developing fuel efficient engines.
Staff Blog

The Staff

John German
John German
Senior Fellow / US Co-Lead
Nic Lutsey
Nic Lutsey
Program Director / US Co-Lead
Peter Slowik
Peter Slowik
Associate Researcher