Raising standards: The Senate voted to require average fuel economy of 35 miles per gallon for new cars, pickup trucks and SUVs by 2020, the first significant boost in nearly 20 years.

Current standards: Automakers must meet an average of 27.5 mpg for cars and 22.2 mpg for SUVs and small trucks.

Single standard: The legislation for the first time would establish a single fuel economy standard applicable to not only cars, but also SUVs and pickups, which currently have to meet less stringent requirement.