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The reductions in passenger vehicle emissions that have been achieved since the mid-twentieth century are a great environmental success story. Government regulation of tailpipe emissions and private investments in breakthrough technologies such as the three-way catalytic converter have reduced emissions of nitrogen oxides, carbon monoxide, and hydrocarbons by 75 to 90 percent at a relatively small cost to consumers. Since California first established emission standards for passenger vehicles in the 1960s, different regulatory approaches have been adopted by the United States, Japan, and Europe, and each has been emulated to some degree in other parts of the world. Significant work remains to replicate these successes throughout the rest of the global fleet.

The massive impact of passenger vehicles on climate also remains to be addressed. The transportation sector is responsible for about one-quarter of energy-related greenhouse gas emissions worldwide. Passenger vehicles account for just under half of this total, and will remain the predominant source of these emissions for the foreseeable future.

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Accelerating progress from Euro 4/IV to Euro 6/VI vehicle emissions standards
Details options for and benefits of leapfrogging the Euro 5/V LDV/HDV vehicle emissions standards, and instead progressing directly from Euro 4/V to Euro 6/VI.
Briefing
Proposed Saudi Arabia CAFE standard for new LDVs 2016-2020
The proposed standards, which apply to all new and used passenger vehicles and light trucks, will phase in from 2016 through 2020. The standards for new vehicles are patterned after the U.S. CAFE structure and follow the 2012–...
Policy update
Road transport in the EU Emissions Trading System: An engineering perspective
Assesses the effect on technology innovation and deployment if mandatory CO2 standards in the EU were replaced by including road transport in the EU Emissions Trading System, as some have recently proposed.
Working paper
 

News

News

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Want to save energy? Fly the environmentally friendly skies
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2015 Nissan Pathfinder 4x4 Review (With Video)
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From the ICCT Blogs

A primer on U.S. fuel economy standards
Why comparing consumer window-sticker fuel economy labels directly with the “54.5 mpg” 2025 standard falsely exaggerates the size of the challenge. 
Staff Blog
A Rorschach test for transport geeks: Passenger vehicle fuel efficiency in Japan
Is the fact that Japanese automakers stay 5–7 years ahead of regulatory targets evidence that they're geniuses, or that their regulators are unable to set realistic targets, or something in between?
Staff Blog
Committing to clean up cars and trucks
Mexico's INDC (Intended Nationally Determined Contribution) to reduce greenhouse gas emissions is tied to real and actionable policy goals.
Staff Blog

The Staff

Anup Bandivadekar
Anup Bandivadekar
Program Director / India Lead
John German
John German
Senior Fellow / US Co-Lead
Hui He
Hui He
Senior Policy Analyst / China Co-Lead
Fanta Kamakaté
Fanta Kamakaté
Chief Program Officer
Peter Mock
Peter Mock
Europe Managing Director / EU Lead