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WASHINGTON—Major truck manufacturers and operators of large commercial fleets cautiously embraced federal standards released Tuesday requiring cuts in fuel usage of big trucks, one of the last in a long line of regulations President Barack Obama has issued over the past several years seeking to clamp down on greenhouse gas emissions across the U.S. economy. […]

The Owner-Operator Independent Drivers Association said new and more expensive technology requirements places an unfair burden on smaller truck companies that rely solely on their reputation and can’t wait years to pay off the standards’ cost.

“One truck going down, that is a huge, huge impact,” said Scott Grenerth, regulatory affairs director for the association. He added that in 2014, 49% of all fleets only had one truck. “There is very little room for error in an industry that calculates things down to the penny per mile.”