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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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NOx control technologies for Euro 6 diesel passenger cars
Analyzes results of emissions tests on 32 Euro 6 diesel passenger cars from 10 different manufacturers. Results show some automakers meeting diesel NOx emissions standards under more realistic driving conditions, while others...
White paper
Assessment of leading electric vehicle promotion activities in United States cities
Surveys actions being taken by state and local governments and public utilities to facilitate electric vehicle deployment in the 25 largest U.S. metro areas. Presents city-specific analysis of consumer benefits and links between...
White paper
Hybrid vehicles: Trends in technology development and cost reduction
Technical summary for policy makers of the status of hybrid vehicle development in the United States. First in a series of technical briefing papers on trends in energy efficiency of passenger vehicles in the U.S.
Briefing
 

News

News

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From the ICCT Blogs

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Correcting the record: CALmatters story on California's goal to cut oil use
I was quoted out of context in a story on Senate Bill 350, which would assert California's role as a global leader in transportation and environmental policy as emphatically as the state has ever done.
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Electric vehicles rising, in select US cities
As our latest study demonstrates, digging down to the city and regional level can illuminate what's really happening across markets and identify how policies and promotional activities are connected to electric vehicle sales.
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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