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Publicly traded less-than-truckload carriers generally posted lower earnings in the third quarter, with several fleets warning that freight volumes would get worse as the fourth quarter unfolds.

Rail and intermodal traffic declined last week compared with the same week a year ago, the Association of American Railroads said.

NEW ORLEANS — Fleet executives said that despite the benefits of using safety technology, attitudes within the industry need to change in order to have wider acceptance.

The Justice Department filed an amicus brief in support of American Trucking Associations’ challenge to the Ports of Los Angeles and Long Beach’s port concession plans.

Truck dealership Rush Enterprises’ third-quarter net income fell to $8 million, or 21 cents a share, down from $13.1 million, or 34 cents, a year ago.

Truckload carrier Knight Transportation’s third-quarter profit rose to $16.1 million, or 19 cents a share, from $14.5 million, or 17 cents, a year ago.

Greatwide Logistics Services, a provider of non-asset-based transportation and third-party logistics services, said it will be acquired by a private investor group.

Iteris Inc., which makes lane-departure warning systems for the trucking industry, said late Tuesday its fiscal second-quarter profit decreased from a year ago.

Transportation and third-party logistics firm C.H. Robinson Worldwide said its third-quarter profit rose to $93.6 million, or 54 cents a share, from $83.7 million, or 48 cents, a year ago.