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China's first national portable emissions testing standard for heavy-duty vehicles

In September 2017, China’s Ministry of Environmental Protection issued the first national standard for portable emission measurement system (PEMS) testing of heavy-duty vehicles (HDVs). The...
Published 2017.11.15: Publication

Vehicle and fuel standards can dramatically reduce air pollution in Brazil, São Paulo’s air quality data demonstrate

São Paulo’s Environmental Agency, CETESB, announced in February 2017 that new heavy-duty vehicle emissions standards will take effect in Brazil starting in 2019, and as we discussed here, the next...Implementing P-8 (Euro VI-equivalent) standards for trucks and buses might be the most cost-effective way to improve air quality, not just in São Paulo but nationwide. The benefits associated with P-...
Published 2017.05.31: Blog Post

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

Access publication here: Nature, 25 May 2017, doi:10.1038/nature22086 Nitrogen oxide (NOx) emissions from diesel cars, trucks, and buses are a major contributor to air pollution-related deaths...
Published 2017.05.15: Publication

New study quantifies global health, environmental impacts of excess nitrogen oxide emissions from diesel vehicles

Diesel vehicles in major markets produce over 50% more NOx than official certification limits indicate Study links these excess NOx emissions to ~38,000 premature deaths worldwide in 2015—mostly in...
Published 2017.05.15: News

[Press release] European Union: Emissions of toxic nitrogen oxides by Euro 6 diesel passenger cars are more than double modern diesel trucks'

In Europe, the average amount of nitrogen oxides (NOx) present in exhaust emissions from modern diesel passenger cars is more than double the levels from modern trucks and buses, a new paper by the...
Published 2017.01.05: News

NOx emissions from heavy-duty and light-duty diesel vehicles in the EU: Comparison of real-world performance and current type-approval requirements

More diesel vehicles are sold in Europe than in China, India, and all of the Americas combined—over 8.8 million in 2014 alone, more than double the sales in the next largest diesel market, China (...
Published 2017.01.05: Publication

Accelerating progress from Euro 4/IV to Euro 6/VI vehicle emissions standards

After the adoption of Euro 5/V standards in the EU, certain shortcomings in the regulation became apparent. For heavy-duty vehicles, Euro V standards have not achieved hoped-for reductions for NOx...
Published 2015.03.05: Publication

Comparing real-world off-cycle NOx emissions control in Euro IV, V, and VI

Heavy-duty vehicles built and certified in conformity to Euro IV and V emissions standards frequently do not achieve the real-world NOx emissions expected under those standards. Now data is becoming...
Published 2015.03.02: Publication

Supplemental NOx standards for Euro IV/V HDVs in Beijing

Some heavy-duty diesel vehicles certified to the Euro IV and V standards emit excess NOx emissions when operating in low-speed, urban driving conditions. In some cases, real-world NOx emissions from...
Published 2013.07.18: Publication

Urban off-cycle NOx emissions from Euro IV/V trucks and buses

Despite meeting more stringent regulatory standards for exhaust emissions during type approval, many Euro IV and Euro V heavy-duty vehicles equipped with selective catalytic reduction (SCR) systems...
Published 2012.04.10: Publication