> Americans are driving bigger and bigger vehicles..
vehicles have gone up in size globally. this might be driven primarily by the whims and desires of the US market, but it's by no means isolated to the United States.
I (and decent amount of people live in Japan) are unhappy with most car models become big for width (except JDMs and subcompacts, it's fortunate them exists). It become big because car is generally developed and sold for global market, rather than domestic.
vehicles have gone up in size globally. this might be driven primarily by the whims and desires of the US market, but it's by no means isolated to the United States.