I just wanted to comment about Salt Lake City drivers being ranked 10th in nation in rudeness. Having moved here three years ago and having commuted in Los Angeles, Pittsburgh, San Diego and Phoenix, there is one very peculiar habit in Salt Lake City that ranks high in rudeness. It is what I call "closing the gap."
Here's how it happens. You want to change lanes, you look and see that there is plenty of room. But as soon as you signal your intent, the driver in that lane accelerates to "close the gap" and prevent your lane change. I have experienced this repeatedly since arriving here and have observed it happening to others.
Salt Lake City