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The Department of Defense should not have awarded its largest-ever third-party logistics contract to Menlo Worldwide Government Services because one of Menlo’s subcontractors plans to use a freight management technology that was untested “in a customer environment,” according to a formal protest filed by Ryder Integrated Logistics.

Consumer personal spending rose 0.6% in August, the biggest in four months, the Commerce Department said Friday.

American Trucking Associations said that the public interest group that claims to promote highway safety disregards the safety advantages of truck drivers’ hours of service regulations the group has repeatedly challenged in court.

The national average price of retail diesel cracked $3 for the first time in nearly 13 months with a 6.8-cent-a-gallon price hike last week, the fourth straight weekly increase.

NASHVILLE, Tenn. — Cummins Inc. said it will not use selective catalytic reduction for its 2010 heavy-duty engines, making it the first manufacturer to reject the urea-based system widely used in Europe to cut emissions.

The Federal Motor Carrier Safety Administration asked a federal court for a year-long delay in implementing its decision to strike down two parts of the agency’s driver  hours-of-service rule.

Construction spending rose 0.2% in August, the Commerce Department said Friday.

Manufacturing activity in the Chicago region rose in September, the National Association of Purchasing Management said Friday.