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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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Recently Released

Real-world exhaust emissions from modern diesel cars
Documents the discrepancy between type-approval and real-world NOx emissions from new diesel passenger cars. On average, on-road NOx emissions from the vehicles tested for this analysis were about seven times higher than the...
White paper
From laboratory to road: A 2014 update
Extends an analysis of the gap between official and real-world fuel consumption and CO2 emissions for passenger cars in Europe, which reached 38% in 2013 and continues to grow at an accelerated pace.
White paper
Policy update: Bharat Stage IV emission standards for two-wheelers in India
Overview of the standards that take effect for type approval of new motorcycles in April 2016, and for all motorcycles in April 2017. The standards tighten HC+NOX limits by 23%–60%, and adopt the Worldwide Harmonized Motorcycle...
Policy update
 

News

News

Software update causes glitches on RFTA buses
“To allow any engine to run on public roads, you have to go to...

2015 Honda Fit EX Long-Term Arrival
Otherwise, I would've told him that, yes, the 2015 Fit does...

Do spoilers actually improve a car's performance?
While a spoiler might not help your car's handling or fuel...

Sorry Canada, it's Americans who have embraced hybrids
Canadians are concerned about fuel economy and buy small cars...

From the ICCT Blogs

Canada's Environment Minister announces new regulatory measures for vehicles and fuels
Three new regulatory initiatives announced by Minister Leona Aglukkaq will reduce GHG emissions and improve the environmental performance of both the light- and heavy-duty vehicle fleets.
Staff Blog
A trend that can’t continue: The gap between official and real CO2 reductions from Europe’s passenger car fleet keeps growing
We've just released an update to our study of the discrepancy between offiical and real-world CO2 emissions from passenger cars in the EU. The bad news: the gap continues to increase, and at an accelerating rate: for private cars it rose to 31 percent in 2013, and for company cars (a large proportion of the fleet in Europe) the gap is even greater, 45 percent in 2013.
Staff Blog
此消彼长的新能源汽车市场(2014上半年更新)
2014年上半年中国电动汽车销量明显提升,近期各项新政的出台再次给电动车市场的扩张强有力的支持。此外,世界两大电动车市场发生了有趣的变化,瑞典的电动车销量陡然上升,其他市场较为稳定。原因为何?我们观察了几个比较有趣的市场。
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