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It wasn’t the best of times. It wasn’t the worst of times. This year’s Mid-America Trucking Show was as notable for what didn’t happen as it was for what did occur on the floor of the Kentucky Exposition Center in Louisville, Ky.

FedEx Corp.’s fiscal third-quarter profit declined from a year earlier as international airfreight remained weak and customers increasingly selected slower, less expensive services, the company said last week.

Retail fuel prices declined for a third consecutive week as the national average for diesel dipped 4.1 cents to $4.047 a gallon, while gasoline slipped 1.4 cents, according to the Department of Energy.

LOUISVILLE, Ky. — Engine maker Cummins Inc. said it will introduce some of the fruits of its “SuperTruck” research in its upcoming models that will make them more fuel-efficient.

LOUISVILLE, Ky. — Westport Innovations and Clean Energy Fuels Corp. announced a new joint program aimed at further accelerating the adoption of liquefied natural gas vehicles among trucking companies.

United States and Canadian officials have agreed to launch a pilot program that they say could improve trade by allowing U.S.-bound trucks to be inspected on the Canadian side of the border at two crossing locations.

COLUMBUS, Ind. — North American truck production in 2013 is on course to virtually match last year and will spike almost 15% in 2014 on stronger economic growth, ACT Research Co. President Kenny Vieth predicted.

President Obama again proposed federal tax credits for buyers of trucks powered by natural gas, including such a plan in his newest energy initiative on March 15.

The hottest trend in heavy-duty truck transmissions — the growing acceptance of automated manual models — not only takes most of the shifting worries out of drivers’ hands but also integrates with other operating systems such as cruise control and engine brakes to make operations safer, easier and more fuel-efficient, according to manufacturers.

WASHINGTON — Lawyers representing the federal government told an appeals court that industry objections to the latest changes to hours-of-service rules for truck drivers are nothing more than “simple scientific disputes” and that the court should defer to the government’s judgment in solving such disputes.