Jamie,
In having panic attacks, an often common anxiety provoking situation is getting caught by a stoplight. It was for me! And the thoughts are more "What if I just totally lose it and go crazy, and hit the gas", but we dont act on it. It came to the point on my daily driving I knew where every stoplight was, and if I was a bit down the road, and it was already red, I drove a tad slower, knowing when I reached there, it would be green.