programs / Heavy-duty vehicles


The steady growth in freight transport by truck presents a challenge to efforts at reducing hazardous air pollution and greenhouse gas emissions. Though most countries have fuel economy standards for passenger vehicles, as of 2011 only Japan and the United States have set efficiency and GHG emission standards for heavy-duty vehicles.

Most heavy-duty vehicles are powered by diesel engines that, without pollution controls, can emit high levels of other pollutants that contribute to global warming  and local air pollution.  For example, uncontrolled diesel vehicles produce high levels of particulate matter, a fraction of which has a warming effect, and nitrogen oxides, which are an ingredient of ozone (also known as smog), an important greenhouse gas. These pollutants are associated with bronchitis, asthma, and other lung diseases, and are responsible for millions of premature deaths worldwide. In 2013, the World Health Organization classified diesel exhaust as carcinogenic to humans, based on evidence of an increase in lung cancer after long-term exposure.

Featured Work



Recently Released

Direct progression from Bharat IV to Bharat VI national vehicle emission standards in India
Concisely sets forth the case for leapfrogging from BS IV to BS VI vehicle emissions standards in India, and states the ICCT's position in favor of expediting progress to Bharat VI.
Review of Current Practices and New Developments in Heavy-Duty Vehicle Inspection and Maintenance Programs
Inspection and maintenance (I/M) programs are key to identifying high-emitting vehicles and mitigating their impact on air quality and climate. This paper assesses best practices for I/M programs targeting heavy-duty vehicles...
White paper
Market analysis of heavy-duty vehicles in India
Comparative analysis of HDV sales in India in terms of manufacturer market share and vehicle characteristics. Additional discussion of engine attributes aimed at developing a categorization scheme.
Working paper



E.P.A. to Unveil New Limit for Smog-Causing Ozone Emissions
The new rule, set at the weakest standard in the range...

arbcombo -- Regional Workshops to discuss a draft Short-Lived Climate Pollutant Strategy
The Air Resources Board (ARB or Board) will hold workshops to...

India submits its climate action plan, asks rich nations to cooperate in achieving its goal
India on Thursday submitted its 'climate action plan' to a UN...

arbcombo -- 2015 Haagen-Smit Clean Air Awards - Nominations Now Being Accepted
If you know someone in the air quality community scientists,...

China's commitment to improving heavy-duty vehicle efficiency [Press statement]
Last Friday, during President Xi Jinping’s visit to...

FAQ: In-use NOx emissions from diesel passenger cars
As the story concerning in-use NOx emissions from diesel...

Real-world vehicle fuel economy gap continues to widen in Europe [press release]
Latest study shows average discrepancy between passenger vehicle...

EPA's notice of violation of the Clean Air Act to Volkswagen [press statement]
Investigation into "defeat device" allegedly used to...

From the ICCT Blogs

Dispelling some myths about the gap between test-lab and real-world vehicle CO2 emissions
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.
Staff Blog
Global milestone: The first million electric vehicles
Sometime this month, somewhere in the world, the millionth modern electric vehicle will hit the road. And in NYC, farsighted governments of the new International ZEV Alliance are coming together to spur deployment of the next million, and more.
Staff Blog
Brazil is not ready for diesel cars
Brazil should hold the line and continue to ban sales of diesel passenger cars.
Staff Blog

The Staff

Fanta Kamakaté
Fanta Kamakaté
Chief Program Officer
Nic Lutsey
Nic Lutsey
Program Director / US Co-Lead
Rachel Muncrief
Rachel Muncrief
Heavy-Duty Vehicles Lead
Benjamin Sharpe
Benjamin Sharpe
Senior Researcher / Canada Lead