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Fuel consumption simulation of HDVs in the EU: Comparisons and limitations

The CO2 certification procedures for HDVs in the EU and the United Stated use a combination of component testing and vehicle simulation to assign official CO2 emission and fuel consumption values....
Published 2018.03.06: Publication

How things work: OMEGA modeling case study based on the 2018 Toyota Camry

The 2018 Toyota Camry incorporates eight technology upgrades that are specifically modelled in the U.S. Environmental Protection Agency’s Optimization Model for Reducing Emissions of Greenhouse Gases...
Published 2018.02.21: Publication

The role of standards in reducing CO2 emissions of passenger cars in the EU

The origin of the EU vehicle CO2 regulation is by now a well-known story. European car manufacturers promised to voluntarily reduce average CO2 emissions of new cars to 140 g/km by 2008, starting in...
Published 2018.02.12: Publication

U.S. fuel economy trends reflect a business strategy, not a technology challenge

The Environmental Protection Agency recently released its 1975-2017 Fuel Economy Trends report and its 2016 Manufacturer Performance report. For the last year or two the auto manufacturers have been...The next time somebody cries crocodile tears about how sales trends show the automakers struggling to meet the fuel economy targets and falling behind despite their best efforts, tell them you want...
Published 2018.01.19: Blog Post

South Africa's new passenger vehicle CO2 emission standards: Baseline determination and benefits assessment

South Africa’s new passenger vehicle fleet is the largest on the African continent and the 18th largest globally. South African manufacturers sold more than 412,000 new vehicles in 2015, and exported...
Published 2018.01.17: Publication

Addressing misconceptions surrounding light-vehicle fuel efficiency standards

This briefing addresses several common misconceptions about light-duty vehicle fuel efficiency and greenhouse gas standards. The focus of this briefing is on Australia’s proposed light-vehicle CO2...
Published 2017.10.12: Publication

Status of policies for clean vehicles and fuels in select G20 countries

Realizing the immense opportunity to promote energy efficiency in their economies, G20 economies adopted an Energy Efficiency Action Plan that identified six focus areas for collaborative activity,...
Published 2017.08.15: Publication

Impacts of world class vehicle efficiency and emissions regulations in select G20 countries

In 2014, the G20 Energy Efficiency Action Plan prioritized the establishment of a Transport Task Group (TTG) to promote cooperation among participating G20 countries to develop domestic policies that...
Published 2017.01.25: Publication

The power of vehicle taxation schemes

In an earlier blog post, I wrote about the current vehicle market structure in Turkey and also mentioned that purchasing and owning a vehicle in Turkey is quite expensive, mainly due to the high...Changing the vehicle taxation scheme in Turkey from one based on engine displacement to one that uses CO2 emissions as the underlying metric would help to overcome the current market hurdle for low-...
Published 2016.08.18: Blog Post

Reducing vehicle emissions in Turkey

Turkey is one of the largest vehicle manufacturing countries in the world, and the auto industry plays a key role in the Turkish economy. For Turkey, it is of particular importance to ensure that the...
Published 2016.08.17: Publication

The future of vehicle emissions testing in Europe (and beyond)

At the ICCT we have been analyzing the growing gap between official and real-world vehicle fuel consumption and CO2 emissions of passenger cars in Europe for a few years now. We showed for the first...To solve the problem underlying the growing gap between certification-test and in-use CO2 and NOx emissions, we will have to go beyond just introducing a new test procedure.
Published 2015.11.23: Blog Post

What EU cars’ CO2 emissions have in common with supermarket prices

When you think back to your most recent stop at the supermarket, you will probably recall that most of the price tags you saw ended with the digit "9". Maybe 99 cents for a chocolate bar and 49 cents...It’s about 15 times more likely that the official CO2 emission level of a new car sold in the EU is something-"9" g/km than something-"1”. And there’s a remarkable correlation between that phenomenon...
Published 2015.10.14: Blog Post

Policy solutions to reduce vehicle exhaust emissions under real-world driving conditions

Policymakers worldwide are looking for ways to address the challenge of controlling real-world emissions brought to forefront by the Volkswagen case. In this position brief, we propose a rapid and...
Published 2015.10.01: Publication

Dispelling some myths about the gap between test-lab and real-world vehicle CO2 emissions

We've just released the annual update to our From Laboratory to Road series, which documents the growing gap between official, or type-approval, CO2 emissions from passenger cars in Europe and their...An explanation of what has and has not caused the gap between test-lab and real-world vehicle CO2 emissions to increase by over 30 percentage points in just over a decade.
Published 2015.09.30: Blog Post

China's commitment to improving heavy-duty vehicle efficiency [Press statement]

Last Friday, during President Xi Jinping’s visit to Washington, DC, China announced further significant steps to limit greenhouse gas emissions. Among the important elements of China’s strategy is a...
Published 2015.09.28: News

Policies to reduce fuel consumption, air pollution, and carbon emissions from vehicles in G20 nations

The transport sector consumes more than half of global oil production, and releases nearly a quarter of all anthropogenic carbon dioxide emissions. Motor vehicles and engines contribute to ambient...
Published 2015.06.08: Publication

European vehicle market statistics, 2013

Update: The 2014 edition of the EU Pocketbook is now available here. The European Vehicle Market Statistics Pocketbook offers an annually updated, statistical portrait of passenger car and light...
Published 2013.10.28: Publication

Full-throttle into the future: New data should turbocharge cars CO2 debate

Statistics confirm what personal observation suggests: Efficient vehicles are available today in Europe in significant and growing numbers. And for that reason, the CO2 emissions targets for 2020...
Published 2013.10.28: News

European vehicle market statistics, 2012

  The 2013 edition of European Vehicle Market Statistics is now available And see the EU Pocketbook online,, for interactive charts and underlying data.   The 2012 edition of...
Published 2012.10.29: Publication

Reducing automobile CO2 emissions: Can the EU draw lessons from Japan?

A few months ago we were contacted by some grad students from the Environmental Policy Research Centre (FFU) at the Free University Berlin who were working on a comparison of vehicle CO2 regulation...Some notes on, and a link to, a recent project report from students at the Free University Berlin comparing policy-making progress.
Published 2012.08.16: Blog Post