That's a big number.
From the Washington Post:
The Obama administration will finalize strict new fuel-efficiency vehicle standards Tuesday, requiring the U.S. auto fleet to average 54.5 miles per gallon by 2025, according to individuals briefed on the matter.
The new rules, which expand on existing standards requiring American-made cars and light trucks to average 34.5 mpg by 2016, will significantly cut U.S. oil consumption and greenhouse gas emissions by the time they are fully implemented, the Environmental Protection Agency says. Unlike many energy policies enacted under President Obama, the vehicle standards are a relatively uncontroversial move embraced by industry and environmentalists alike.
Phyllis Cuttino, director of the Pew Clean Energy Program, said the fact that so many people now accept the idea of greater fuel efficiency does not lessen the rules’ “historic” importance.
“We’ve just come a long way in five years,” Cuttino said, noting that in 2007 lawmakers debated whether the U.S. fleet could average 30 mpg by 2025. “This gives me hope for energy policy in this country."
This second phase of standards, which apply to model years 2017 to 2025, will double the efficiency of the U.S. fleet compared with vehicles manufactured in 2008....MORE