Controlling emissions from the in-use fleet, particularly from high emitters and older vehicles, can immediately alleviate urban air pollution. As pressure to address China's air quality issues builds, Guangdong Province has taken several steps toward that end.

On June 19, 2015, the U.S. Environmental Protection Agency and the National Highway Traffic Safety Administration jointly proposed new standards to reduce the fuel consumption and greenhouse gas emissions of new heavy-duty vehicles, tractors, trailers, and engines.

This paper provides a summary of recent data for real-world fuel consumption of HDVs—specifically, tractor-trailers—in three regions: the United States, China, and the

As regulatory agencies in the U.S. work on the second phase of heavy-duty vehicle greenhouse gas (GHG) and efficiency standards, one of the key decisions they face concerns the regulatory certification pathways.

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