DOT is in charge of CAFE regulations. The original law specified standards that were for “passenger vehicles” and “automobiles which are not passenger automobiles”.
DOT interpreted that as trucks, which made sense back then. Unfortunately, every manufacturer just declared their cars to be trucks (invention of the SUV) and the DOT let them.
Then they made it worse by scaling fuel economy to vehicle size, so manufactures just made cars have a larger footprint to be allowed to have worse fuel economy.
I think its the EPA for not regulating truck emissions as stringently as they do for normal cars.
DOT is in charge of CAFE regulations. The original law specified standards that were for “passenger vehicles” and “automobiles which are not passenger automobiles”.
DOT interpreted that as trucks, which made sense back then. Unfortunately, every manufacturer just declared their cars to be trucks (invention of the SUV) and the DOT let them.
Then they made it worse by scaling fuel economy to vehicle size, so manufactures just made cars have a larger footprint to be allowed to have worse fuel economy.
It’s also the auto industry for regulatory-capture of the EPA. It’s an ouroboros of corruption with plenty of blame to go around.