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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

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

How well are governments enforcing vehicle emissions standards? Worldwide, the answer is: Not as well as they could be

New survey-based study shows notable disparities in compliance activities, accomplishments among most important global vehicle markets Washington DC—A new study cataloging and evaluating the efforts...
Published 2017.11.14: News

Global baseline assessment of compliance and enforcement programs for vehicle emissions and energy efficiency

As vehicle pollution and fuel efficiency regulations have become more stringent, the technologies required to mitigate emissions and reduce fuel consumption become increasingly complex. One...
Published 2017.11.14: Publication

Will the future RDE regulation be enough to restore trust in diesel technology?

The Volkswagen Group (including Audi and Porsche), Opel, Fiat, Renault, and now Daimler are recalling millions of diesel vehicles for a software update. All of these manufacturers claim their...The success of the RDE regulation will depend on the will of manufacturers to prove that they have learned a lesson from Dieselgate by beginning to focus on reducing real-world emissions, not just on...
Published 2017.08.30: Blog Post

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

DO Wales 2016

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Published 2017.06.29: Event

Impacts and mitigation of excess diesel NOx emissions in 11 major vehicle markets

A new study published online May 15 in the journal Nature quantifies the global health and environmental burden of real-world diesel NOx emissions in 11 major vehicle markets. The study found that...
Published 2017.05.22: Event

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

Technology pathways for diesel engines used in non-road vehicles and equipment

Internal combustion engines are ubiquitous in today’s society. Applications for these engines cover a broad spectrum, ranging from vehicles that transport passengers and move goods to specialized...
Published 2016.09.16: 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

First look: Results of the German transport ministry's post-VW vehicle testing

In September 2015, shortly after it became known that Volkswagen applied illegal defeat devices in some of its diesel vehicles, the German Ministry for Transport (BMVI) commissioned a series of...Germany, the UK, and France last week released results of testing they commenced after VW admitted to using defeat devices to circumvent emissions tests. The situation seems even worse than expected...
Published 2016.04.25: Blog Post

Defeat devices under the U.S. and EU passenger vehicle emissions testing regulations

The paper aims to illuminate a paradox: Volkswagen and other automakers have asserted that software managing the emissions control systems on some of their vehicles, which they acknowledge either is...
Published 2016.03.22: 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

The miseducation of the diesel car

I recently read an open letter in the Corriere della Sera by a VW engineer working on engine development and emissions (that’s what I call a hot seat!). The letter contains some pretty remarkable...The preliminary agreement on the EU's Real-Driving Emissions regulation is a missed opportunity to address the air-quality problem by forcing the technological adjustments required to bring real...
Published 2015.11.04: 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

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