I've heard that Raggytash, and I suppose it must be true. But when I did Prison Visiting all over the place, I was terrified on the motorways, especially the M25. Every few minutes we all had to change lanes to the right, to let in the joining traffic, then move back to the left. People were horribly aggressive and at speeds of 70mph it was frightening. Also, despite my attempts to stick to 70, people were obviously furious and wanted me to do at least 90!
Maybe I'm just out of practice, pottering around our gentle Norfolk roads. But you're right, the statistics say that rural routes have more fatalities.