The Obama administration set the first-ever fuel-efficiency rules for heavy-duty trucks and buses Tuesday, a move that will cut greenhouse gas emissions and fuel use by everything from long-haul tractor-trailers to school buses over the next several years.
The regulations require heavy-duty trucks and buses to improve their fuel efficiency 5�percent a year from the 2014 to the 2017 or ?18 model years, compared with the industry?s 2010 baseline. The administration estimates that the rules will save a total of $50�billion in fuel costs and 530�million barrels of oil during that period.
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