The Trump administration has finalized new fuel economy standards for US vehicles, giving automakers more flexibility to sell gasoline-powered cars and trucks and reducing the regulatory pressure to improve fuel efficiency. The US Department of Transportation announced the final rule on Monday, setting a fleetwide average fuel economy target of 34.9 miles per gallon (mpg) by model year 2031. That is significantly below the 50.4 mpg target set under the Biden administration.