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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.

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.

The Federal Motor Carrier Safety Administration soon will introduce a program that will list certified medical examiners on a national registry and require all interstate commercial truck drivers to obtain their medical certification from an approved examiner.

California environmental regulators said they are beginning to enforce the state’s five-minute idling limit for diesel-fueled commercial vehicles, including those with sleeper cabs.

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

Daimler AG, citing a “fundamental change” in the heavy-duty vehicle market, will drop its Sterling Trucks brand and cut North American production capacity 20% by closing two factories, including its one-time flagship plant in Portland, Ore., the company’s top executive said last week.

Truckload carrier USA Truck said Thursday its third-quarter profit jumped to $2.4 million, or 23 cents a share, from $16,000, or zero cents, a year ago.