Austin Flickr/JimNtexas Gas prices may finally be cutting into American sprawl, as cities have started growing faster than suburbs and people are driving less than they used to.

So what happens if gas prices keep going higher?

You can't live in a cities like Merriam, Kansas without driving everywhere, as Maggie Koerth-Baker observes in Before the Lights Go Out.

We looked at the cities that spend the most at the gas pump, with 2010 data from consumer data site Bundle. You can imagine what will happen in these places if prices double, triple or worse.