Global Comparison: Heavy-duty Emissions

Over the past 20 years, regulators in Europe, the United States, and Japan have implemented increasingly more stringent emission standards applicable to new heavy-duty engines used in heavy trucks and buses. Many countries outside of Europe follow the European model for engine emission certification, including Brazil, China, India, Russia, South Korea and Thailand. Mexico has historically followed the U.S. model, but has recently changed to allow either U.S. or European-certified engines. Developing countries’ technology paths to compliance with Euro IV and Euro V standards are expected to mirror those of Europe.

Map
The following map summarizes the HDV emission standards currently in force (2014) for selected regions around the world. Note that this map displays national-level regulations only; a number of countries, including China and India, have implemented more stringent standards at the sub-national level.



Timelines
Nationwide * adoption timelines for selected regions are shown in the following table.

 *China and India have implemented more stringent standards in some cities and regions on an accelerated timeframe; for more detailed information see the China: Heavy-duty: Emissions and India: Heavy-duty: Emissions pages.

Limit Values
Selected limit values for widely used international standards are summarized and graphed here:

NOx standards for heavy-duty engines PM standards for heavy-duty engines ''Note that different test cycles and test procedures are used in the United States, European Union, and Japan to certify compliance with the numerical limits shown.

Links
References