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Maersk Inc., owner of the largest ocean carrier, has agreed to sell its chassis rental unit to private investment firm Littlejohn & Co., marking the latest step in the ownership of the chassis that drayage truckers use to deliver containerized cargo.

LAS VEGAS — Terry Dotson never set out to be a truck salesman, but he was so good on the lot selling big rigs that he rose eventually to be chairman and CEO of Worldwide Equipment Enterprises Inc.

Officials of brake manufacturer Bendix Commercial Vehicle Systems said they are wrestling with the challenge of manufacturing and distributing replacement parts for a defective valve that could cause braking problems, which prompted federal and heavy-duty truck manufacturer recalls.

Truckload carrier P.A.M. Transportation Services reported a fourth-quarter profit after posting a loss in the same quarter last year.

Provisions that would have allowed states to permit larger, heavier trucks on interstate highways were voted down last week, just days after the highway reauthorization bill containing the measures was introduced in the House of Representatives.

Florida state police were investigating a huge weekend pileup on Interstate 75 near Gainesville, Fla., that killed 10 people as cars and trucks drove into dense fog and smoke, and a section of the highway remained closed Monday, news services reported.

The federal government’s chief truck overseer defended her agency’s controversial changes to the 34-hour restart provisions of the hours-of-service rule and vowed to continue efforts to cut the hours drivers may be behind the wheel.

Hostess Brands, the maker of Twinkies snack cakes and Wonder bread, filed for bankruptcy Wednesday, less than three years after completing an earlier restructuring.