Here's a
fun infographic and some
DOE data, both of which show that gasoline consumption is on the decline.
People do change their gas consumption habits over time, when faced with sustained high prices. Unfortunately, when someone buys a new SUV or pickup truck, it will take over a decade to get it out of our fleet. When someone builds a new house in the exurbs, it'll be there, and probably occupied, for the better part of a century. It takes a very long time for our society as a whole to respond to energy prices.