About 1/3 of Class 3-8 trucks in US equipped with advanced cleaner diesel engines
Green Car Congress
JULY 3, 2014
The data includes total registration information on Class 3-8 trucks from 2007 through 2013 in all 50 states and the District of Columbia. Beginning in 2007, all heavy duty diesel trucks sold had to meet particulate emissions levels of no more than 0.01 grams per brake horse-power hour (g/bhp-hr).
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