About 1/3 of Class 3-8 trucks in US equipped with advanced cleaner diesel engines
Green Car Congress
JULY 3, 2014
Texas, California and Indiana have the most overall number of clean diesel trucks, as well as the highest number of post-2010 diesel trucks (although California and Indiana swap positions); beginning with the 2010 model year, 100% of the new on-road heavy-duty diesel engines were required to meet the EPA’s stringent NO x standards.
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