More than one-third of all medium- and heavy-duty commercial trucks registered in the United States—2.9 million of 8.8 million trucks—are now equipped with newer technology clean diesel engines, according to new data compiled by HIS Automotive for the Diesel Technology Forum (DTF).
The new 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/HP-hr)—a level near zero.