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Navistar International Corp. announced that it has resolved its lawsuit against the U.S. Environmental Protection Agency, which had challenged EPA’s guidance to engine makers for certification of 2010 engines using selective catalytic reduction to cut emissions.

The tank truck industry faces a unique set of challenges that have led to increased regulations, self-imposed safety precautions and higher costs. Industry executives said they are adjusting by embracing new technology, providing additional driver training and re-examining their operations. 

The nation’s three largest manufacturers of commercial truck tires have raised prices for the second time this year in reaction to sharp increases in the costs of their primary components — rubber, oil and steel — although world economic developments have taken some of the air out of commodity prices.

The average retail price of U.S. diesel jumped 4.4 cents to $3.122 a gallon last week, its highest level in more than 18 months, the U.S. Department of Energy reported.

Initial jobless claims dropped by 7,000 last week, the Labor Department said Thursday.

U.S. workers’ productivity rose at an annual rate of 3.6% in the first quarter, the smallest in a year, Labor Department said Thursday.

Transportation software firm Xata Corp. said it lost $402,000, or 23 cents per share, in its fiscal second quarter, compared with a profit of $91,000, or 5 cents, a year ago.

Logistics firm Expeditors International of Washington’s first-quarter profit rose to $61.3 million, or 29 cents a share, from $59.3 million, or 28 cents, a year ago.

Connecticut lawmakers have adopted a measure that could net drivers of trucks and cars $75 fines for not removing snow and ice from their vehicles — and fines of as high as $1,250 if ice or snow flies off and causes damage or injury.