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The U.S. Transportation Department believes that California’s plan to enact a program to cut global-warming emissions from vehicles is a state-level fuel-economy rule, Bloomberg reported.

Estes Express Lines said Friday that its Estes Air division will be reorganized as Estes Air Forwarding LLC, effective Sunday, July 1.

James Burr likens the job of forecasting diesel fuel prices to that of a television weatherman.

Package delivery firm DHL said Thursday it acquired a 49% stake Polar Air Cargo Express, a unit of Atlas Air Worldwide Holdings, to expand its business in the Asia-Pacific region.

We have had many examples of questionable DOT inspections — including two we had last month in Idaho on the same owner-operator’s tractor-trailer that were clean, but not Level 1s, which are the most thorough standardized inspections.

A convoy of 100 diesel trucks motored slowly along the Harbor Freeway from South Los Angeles to the Port of Long Beach Wednesday as part of a push for cleaner air and better working conditions for drivers, television station KTLA reported on its Web site.

Sweden’s Volvo AB said its truck sales fell 10% first five months of the year, as U.S. deliveries plunged after stricter emissions standards made trucks more expensive, Bloomberg reported.

A push for lower emissions from heavy-duty trucks, coupled with grants from state and localities in order to meet Southern California’s air-quality standards, are prompting interest in and sales of new trucks in the region, the Long Beach Press-Telegram reported Monday.