The NHTSA has raised mileage standards for the 2011 model year. As part of regulations created in December 2007 to increase automotive fuel mileage by 40 percent by 2020, NHTSA has increased mileage standards for cars to 30.2 miles per gallon, up from 27.5. Light truck mileage standards will increase to 24.1 mpg from 23.1 mpg. Overall, fleet-wide mileage standards were raised by 2 mpg.
If fully enacted, the 40 percent increase would result in cars and trucks achieving a fleet-wide average of 35 mpg by 2020, though recent efforts by California and other states to impose bans on greenhouse gas emissions may result in even tougher standards being imposed.