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Class 8 trucks rolled up 139.3 billion miles in 2006, up from 130.5 billion in 2005, according to American Trucking Associations’ American Trucking Trends 2008-2009 report, released this week.

The U.S. Environmental Protection Agency has issued its final rule requiring heavy-truck manufacturers to install onboard diagnostic systems starting in 2010 to alert drivers when engine emission systems are malfunctioning or deteriorating.

The Used Truck Association has named Marty Crawford, an Atlanta-based dealer for Arrow Truck Sales, as its president.

Diesel engine maker Cummins Inc. lowered its 2008 sales and profit forecast, due to “significant declines” in demand.

Truckload carrier Celadon Group said it paid $24 million to acquire the truckload, intermodal and brokerage businesses of Continental Express.

Diesel engine maker Cummins Inc. said Friday it would cut “at least 500 jobs,” or 3.5% of its workforce, by the end of the year, due to “the continued deterioration in the U.S. economy and many other key markets around the world.”

ATLANTA — Meritor WABCO demonstrated its new automatic braking system for heavy-duty trucks that is integrated with its anti-lock braking and stability control systems. Executives said the system can cut accident rates, especially rear-end collisions, which account for nearly 20% of all truck-involved crashes.

The number of U.S. Class 8 trucks on the road at the end of the third quarter dropped by 17,000 from a year earlier, the first year-to-year decline since research firm R.L. Polk & Co. began reporting on truck fleets in 2003.

There are signs that the rise of global tire imports to the United States is beginning to slow as the economy weakens and costs increase.

NAVTEQ announced last week that it will acquire T-Systems Traffic GmbH, a German traffic data firm.