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Unfavorable economic trends and fuel prices will collaborate to propel trucking companies’ first-quarter earnings below year-ago levels and will lead to a shrinkage of the fleet in the truckload sector, industry analysts said.

As I understand the new driver-training rules, they indicate that a company cannot hire drivers if that company has a school for training those drivers. This is in conflict with every training institution in the country — if not the world.

Diesel engine maker Cummins Inc. said Tuesday it opened its first fuel systems manufacturing site outside of North America, the Cummins Fuel Systems Wuhan plant, in China.

Clean Diesel Technologies said Tuesday it has licensed its wire mesh filter technology to Headway Machinery Co. Ltd., the largest commercial diesel engine exhaust company in China.

LOUISVILLE, Ky. — As competing engine makers continued their public battle over the best technology for meeting 2010 federal emission standards, analysts said the outcome of the competition could dramatically transform the industry.

As we move closer to the next federal mandate on emissions — which comes into force for 2010-model heavy-duty trucks — proponents of the two competing technologies are beginning to publicly argue over the superiority of their choices.

Auxiliary power units, initially pushed by federal and state governments to reduce air pollution despite concerns by fleet owners and owner-operators over their initial cost, are attracting more buyers who purchase them for the fuel savings, now that average diesel prices are about $4 a gallon.