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America’s service industries expanded in August at the weakest pace in six years, joining manufacturers in an abrupt slowdown that may signal waning optimism about the economy.

The federal government has issued a proposed rule requiring new heavy­duty vehicles to be equipped with speed-limiter devices that many large trucking fleets have been using voluntarily for several years.

The Phase 2 greenhouse-gas emissions final rule gave natural-gas advocates victories in how the alternative fuel is handled and how emissions of methane are regulated, they said, even as the rule forecast little chance of natural gas becoming a major fuel source for heavy-duty trucks in the next decade.

Deficient roads and bridges and congested highways in California are costing the state’s motorists $53.6 billion a year and are increasing overall operating costs for trucking and shipping companies, according to a new report by a Washington D.C.-based transportation research group.

The past two directors of the Georgia Ports Authority will combine to earn $1 million in pension payments alone this year.

The following may sound like an exaggeration: "We're washing blood off our highways every day," said Cpl. Jess Thornton of the Alabama State Troopers.