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The accuracy of the Global Positioning System could be compromised as early as next year if the U.S. Air Force cannot meet an ambitious schedule for space and ground infrastructure deployment, according to a new report from the Government Accountability Office.

Truck and engine manufacturer Navistar Inc. has challenged the Environmental Protection Agency’s authority to certify heavy-duty diesel engines using selective catalytic reduction to meet the agency’s 2010 emission standards, saying EPA skipped an important regulatory step.

The average price of a gallon of diesel fuel jumped 7.8 cents last week to $2.352 a gallon, the highest level since December, while gasoline rose another 8.9 cents as crude oil pushed near $70 a barrel, the Department of Energy reported.

Air and freight forwarder UTi Worldwide reported a decline in net income and revenue for its fiscal first quarter, due the ongoing recession.

California has set up a loan program for truckers to meet looming stricter emissions requirements next year, but some carriers say the industry is in such a difficult state that they may not last long enough to get the loans, the Santa Cruz (Calif.) Sentinel reported Tuesday.

Onboard scale manufacturer Air-Weigh said that Kalyn Siebert, a subsidiary of Heil Trailer International, has made the Air-Weigh’s trailer scales standard on its heavy-haul trailers.

Before Congress recessed for its Memorial Day break, the House of Representatives passed legislation that could make it easier for employees of FedEx Corp.’s express unit to unionize, and the House energy committee approved a bill that would set up a cap-and-trade program to limit output of greenhouse gases.