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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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Evaluation of state-level U.S. electric vehicle incentives
Introduces a novel methodology to monetize the benefit to consumers of electric vehicle incentives provided by U.S. states, and finds that more battery-electric vehicles are sold in states offering a greater total package of...
White paper
The WLTP: How a new test procedure for cars will affect fuel consumption values in the EU
Identifies and quantifies impacts on type-approval values of the EU's anticipated transition from the NEDC to the WLTP. Notably, the effects of the new driving cycle and the new definition of vehicle test masses result in a...
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New light commercial vehicles in China, 2010: Technology assessment and international comparisons
Assesses fuel consumption and fuel-efficiency technology adoption in China’s LCV market in 2010, focusing on differences among vehicle sub-categories and manufacturers, and compares fleet features and technologies in the U.S.,...
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News

News

2014 Toyota Prius Review: Taking <b>Fuel Economy</b> To A New Level
Toyota has updated the Prius with an all-new model earlier this...

A Model Predictive Control Approach for <b>Fuel Economy</b> Improvement of a Series Hydraulic Hybrid <b>...</b>
The fuel economy of the proposed control scheme shows a...

2014 Mazda CX-5 Review: Spacious and Powerful With Great <b>Fuel Economy</b>
While Mazda is relatively new to the SUV market, the 2014 CX-5...

More cities experiment with electric buses and other, cleaner forms of mass transit
Just as American drivers balance fuel economy, sticker price and...

From the ICCT Blogs

Will a new test procedure solve the problem? Latest developments on EU vehicle testing
Two recent ICCT reports clearly demonstrate the serious on-road problem for CO2 and NOx emissions in Europe. The European Commission is working on it, but the approaches chosen to address the real-world CO2 and NOx problems differ substantially.
Staff Blog
Will GDI engines mean higher particulate emissions? Thanks to already-enacted Tier 3 standards, no
Concerns that engines using gasoline direct injection produce higher particulate emissions overlook two things: the engineering solutions to the problem are already known, and EPA's Tier 3 regulation, which takes effect in 2017, will require them.
Staff Blog
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

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