New vehicles must average 40 mpg by 2026, up from 28 mpg

  • FILE - This Dec. 12, 2018, file photo shows traffic on the Hollywood Freeway in Los Angeles. New vehicles sold in the U.S. will have to travel an average of at least 40 miles per gallon of gasoline in 2026 under new rules unveiled by the government. The National Highway Traffic Safety Administration said Friday its fuel economy requirements will undo a rollback enacted under President Donald Trump. (AP Photo/Damian Dovarganes, File)

DETROIT — New vehicles sold in the U.S. will have to average at least 40 miles per gallon of gasoline in 2026, up from about 28 mpg, under new federal rules unveiled Friday that undo a rollback of standards enacted under President Donald Trump.