programs / Passenger Vehicles

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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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Real-Driving Emissions test procedure for exhaust gas pollutant emissions of cars and light commercial vehicles in Europe
Provides background information and a detailed overview of the RDE legislation, as well as a discussion of its strengths and areas for improvement.
Policy update
Impact of improved regulation of real-world NOx emissions from diesel passenger cars in the EU, 2015−2030
Examines the potential impact of the EU’s real-driving emissions regulation and ICCT’s proposed modifications on real-world emission factors of new diesel cars and projected passenger car fleet NOX emissions in the EU through...
White paper
NOx emissions from heavy-duty and light-duty diesel vehicles in the EU: Comparison of real-world performance and current type-approval requirements
Identifies key differences in the regulations governing certification of NOX emissions from diesel cars (Euro 6) and trucks (Euro VI) that help explain differences in their real-world emissions performance. Ultimately, an...
Briefing
 

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Adding to the pile of evidence: Recent on-road testing results for CO2 and exhaust emissions from Euro 6 light-duty vehicles in the EU
Summarizes the Emissions Analytics testing on nitrogen oxides (NOx) and particulates, both of which pose significant health problems, and CO2 which is vehicles' main contribution to climate pollution.
Staff Blog

The Staff

Anup Bandivadekar
Anup Bandivadekar
Program Director / India Lead
Yoann Bernard
Yoann Bernard
Real World Emissions Researcher
Jan Dornoff
Jan Dornoff
Vehicle Emissions Senior Researcher
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
Peter Slowik
Peter Slowik
Associate Researcher