New vehicles must average 40 mpg by 2026, up from 24 mpg

New vehicles sold in the United States will have to travel an average of at least 40 miles per gallon of gasoline in 2026, up from about 24 mpg, under new federal rules unveiled Friday.

The National Highway Traffic Safety Administration said its fuel economy requirements will undo a rollback of standards enacted under President Donald Trump. For the current model year, standards enacted under Trump require the fleet of new vehicles to get just over 24 miles per gallon in real-world driving. The new requirements increase gas mileage by 8% per...