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Biodiesel producers said they do not agree with calls for the federal government to waive ethanol and other renewable fuel production mandates because of the drought reducing the corn crop in the Midwest.

New regulatory guidance restricting the use of an hours-of-service exemption for some drivers involved in oil and gas drilling operations is increasing operating costs for the affected carriers, executives told federal regulators.

The top truck technicians from across the country will put their skills to the test at the 2012 SuperTech competition, scheduled for Sept. 10-13 in Pittsburgh.

The National Highway Traffic Safety Administration should provide more flexibility in its proposed mandate that new heavy trucks be equipped with electronic stability control systems, American Trucking Associations said in comments filed last week.

The Obama administration has offered states $472 million in federal funding for use toward any transportation construction that previously had been designated for specific projects.

The U.S. Department of Transportation last week launched a test to determine if trucks, cars and buses equipped with wireless devices that allow the vehicles and highway infrastructure to “talk” to each other will prevent crashes, and whether such connected vehicle technology should be required on all vehicles.

With low-mileage used Class 8 trucks increasingly difficult to find, sales declined in July, ACT Research and dealers said.

Cummins Inc. widened its lead in the race to sell Class 8 truck engines during the first half of 2012, providing 63,802 units to customers for a 42.2% market share, up from 34.5% a year earlier, WardsAuto.com reported.

The U.S. retail diesel average price rose 6.1 cents to $4.026 a gallon last week, the first time it has risen above $4 since May, the Department of Energy reported last week.

LISLE, Ill. — Navistar International Corp. executives last week revealed their strategy for introducing a refocused product line with different engine emissions control technology in a bid to recapture market share.