![](http://upload.wikimedia.org/wikipedia/commons/thumb/5/5c/CAFE_Fuel_Economy_vs_Model_Year_and_Footprint_with_2017-2022_Proposals.png/800px-CAFE_Fuel_Economy_vs_Model_Year_and_Footprint_with_2017-2022_Proposals.png)
These are the changes to CAFE that the manufacturers will have to meet.
I took the Sonata as an example. The wheelbase is 110" and track is 62.9" for a footprint of 6919in
2 or 48ft
2. In 2012, it met the standard with 31mpg. By 2016, it has to hit 35mpg, by 2020, it has to hit 42mpg.
There are lots of ways to get there, like hybridization, but the cheapest, is just to cut power.