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Burlington Northern Santa Fe Corp. said its second-quarter profit improved but its revenue fell on lower overall freight demand.

Truckload carrier Knight Transportation’s second-quarter profit was about even with a year ago at $12.6 million, or 15 cents a share, compared with last year’s $12.7 million, or 15 cents.

Transportation and third-party logistics firm C.H. Robinson Worldwide reported a second-quarter profit of $92 million, or 54 cents a share, up slightly from $90 million, or 52 cents a share, a year ago.

A two-mile stretch of Interstate 75 damaged by a fiery explosion last week is expected to reopen Monday, the Detroit Free Press reported.

Navistar Inc. said it has completed 18 months of laboratory and field tests of its “advanced” version of exhaust gas recirculation engine technology that will be used to meet 2010 federal emission requirements.

The idea of removing 10% of truck traffic from the nation’s highways by 2020 to reduce carbon emissions is “almost ludicrous,” Ray Kuntz, former chairman of American Trucking Associations, told a Senate committee last week.

YRC Worldwide’s latest cost-cutting agreement with the Teamsters is expected to save $870 million over 18 months and help the company regain its financial footing, analysts and company officials said.

Drayage truckers blasted world’s largest ocean carrier Maersk Line’s plan to begin charging a chassis-use fee, saying it would raise costs and complicate operations.

J.B. Hunt Transport Services Inc. said its second-quarter profit fell 52%, hurt by mounting pressure on prices and weak demand, as the latest round of quarterly financial reports by public carriers began to roll in last week.