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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

Managing emissions from non-road vehicles
An overview of advanced non-road diesel compliance programs with examples of adopted registration or labeling systems for non-road equipment and compares compliance tools for non-road vehicles with those for heavy-duty vehicles...
Consultant report
A historical review of the U.S. vehicle emission compliance program and emission recall cases
Provides a comprehensive historical review of how the U.S. federal vehicle emission compliance program has evolved over the past 4 decades, reviews U.S. emission recall trends, highlights a few representative vehicle and engine...
White paper
Efficiency technology and cost assessment for U.S. 2025–2030 light-duty vehicles
Analyzes emerging vehicle-efficiency technologies with respect to cost and capacity to lower carbon emissions from passenger cars and light-duty trucks in the 2025–2030 time frame.  
White paper
 

News

News

From the ICCT Blogs

Shell game? Debating real-world fuel consumption trends for heavy-duty vehicles in Europe
The EU is about to propose new standards to limit CO2 emissions from heavy-duty vehicles. Some manufacturers are still trying to persuade policy makers that regs aren't necessary because truck fuel-efficiency really is improving significantly on its own. Don't be fooled; on average, it isn't.
Staff Blog
Euro VI para o Brasil: um caminho claro para céus mais limpos
Em Fevereiro, a CETESB anunciou novas fases para emissões de veículos pesados, leves e motocicletas no Brasil. Esse é um momento oportuno para salientar os grandes benefícios para o Brasil com um alinhamento com o padrão Euro VI para veículos pesados.
Staff Blog
A sneak preview of future stages of Indian emission standards for non-road engines reveals a tractor-sized loophole
In short, it’s welcome news that Indian regulators have set their sights on catching up with best-practice emissions standards for non-road engines. Here’s hoping that in aiming for that goal in 2025 they don’t overlook a simple fix that will bring even more immediate help in solving the persistent air pollution problems facing the country.
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