CINCINNATI — Truck and engine makers said that meeting the federal government’s greenhouse-gas standards that take effect in 2017 while still complying with the 2010 emissions rule is a difficult challenge and could result in more “hard programming” of engine settings and fewer choices for fleets in their tractors.

The White House announced new standards today, to increase fuel efficiency to 54.5 miles per gallon for cars and light-duty trucks by 2025.

A federal appeals court backed the Obama administration's campaign to limit greenhouse-gas emissions, the Wall Street Journal reported Wednesday.

A California group representing businesses has filed a federal lawsuit challenging the federal government’s greenhouse emissions regulations for medium- and heavy-duty trucks.

U.S. cars and light trucks will be required to carry labels comparing estimated five-year fuel costs with those of the average new vehicle, the Department of Transportation and Environmental Protection Agency said Wednesday.

The Federal Motor Carrier Safety Administration has issued new rules that will require brokers working with household goods movers to provide more information to consumers.