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Expansion of the U.S. Class 8 truck fleet is slowing as carriers continue to put off new truck purchases and demand for freight hauling remains soft, according to a new report by research firm R.L. Polk & Co.

In the transportation industry, every trucking company, large or small, does essentially the same thing: Pick up and deliver. So how can smaller carriers compete against larger ones and distinguish themselves from one another?

Canada’s federal, provincial and territorial governments are jointly studying the idea of requiring speed limiters on heavy-duty trucks, the Associated Press reported. The governors would prevent the truck from exceeding about 65 mph.

A proposed California Air Resources Board regulation would force the owners of an estimated 80,000 trucks built before 1994 to remove them from the state’s roads by 2009, a trucking official said.

California regulators proposed new emissions rules for the state’s ports and the trucking industry, designed to begin compliance with ambitious “greenhouse gas” emissions reduction law, the Contra Costa Times reported Friday.

The Owner-Operator Independent Drivers Association said Friday it filed suit to block the Department of Transportation’s pilot program to allow some Mexican trucks to run in full United States.

The U.S. economy’s service sector growth in August held at the same level as the previous month, the Institute for Supply Management said Thursday.

Second-quarter U.S. worker productivity rose at an annual rate of 2.6%, the most in almost two years, the Labor Department said Thursday.