Everybody knows this is true, of course. I live three miles from work. To get here this morning I could have walked 3 blocks to the light rail station near my apartment, then another 4 or so blocks from the destination station to my office. This is pretty convenient, especially in St. Louis, where the vast, vast majority of residents don't have options nearly that good.

But I didn't do it. It was 16F degrees when I left the house this morning. I drove my car.