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An index of U.S. manufacturing activity expanded in January for the sixth straight month to the highest level in five and a half years, the Institute for Supply Management said Monday.

DALLAS — Carrier officials and drivers told federal regulators that the hours-of-service rules work well, but could be improved by allowing more flexibility in the use of truck sleeper berths.

Consumer personal spending rose 0.2% in December, the third straight increase, the Commerce Department said Monday.

I.D. Systems Inc., Hackensack, N.J., paid $15 million in cash to purchase General Electric Co.’s trailer-tracking business, Asset Intelligence LLC, the companies announced.

Within hours of the devastating Haitian earthquake, the president of TEC Equipment Inc., a chain of West Coast truck dealerships, received an e-mail from an employee asking, “What are we doing about Haiti?”

Trucking company failures accelerated in the fourth quarter of 2009 and will continue to rise this year as fleets in the worst financial shape run out of cash and creditors run out of patience with them, a new Avondale Partners report said.

U.S. factory shipments of commercial trailers plunged 44% in 2009 from the previous year to 80,415 units, the lowest total since 1975, as dry van shipments fell to the lowest level since 1961, ACT Research Co. reported.

FRAMINGHAM, Mass. — Bose Corp., the acoustics company best known for its high-end audio equipment and noise-canceling headphones, last week unveiled a sophisticated heavy-duty truck seat designed to ease the wear and tear on drivers.