More than one-third of all medium and heavy duty commercial trucks registered in the US — 2.9 million of 8.8 million trucks — are now equipped with newer technology clean diesel engines, according to new data compiled by IHS Automotive for the Diesel Technology Forum.
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 — a level near zero.
Allen Schaeffer, the executive director of the DTF, says it takes more than 60 clean diesel trucks to equal the emissions from a single 1988 truck.
Indiana (50.4 percent), Utah (45.4 percent) and Oklahoma (44.8 percent) have highest percentage of clean diesel trucks. Meanwhile, Texas (345,456), California (209,098) and Indiana (204,653) lead the nation in total number of clean diesel trucks.
In May the EPA made available $9 million in grant funding for clean diesel projects to reduce air pollution and emissions exposure from existing diesel engines.