The list in post #1 pretty much covers it for me. Except for the rumble strips they want to put into the road on those wide sections. It may be a safety thing for the vehicles, but it looks like (I road next to one for about 15 miles my last "major" ride) it could take down a rider rather quickly (and tear up the wheel).
As for narrower roads, I find those typically to be the most dangerous, especially given the condition that they typically get into. The latest incident involved me hitting a crack in the road and being skipped out right in front of a truck that was behind me. I got the horn honk, of course, but the idea of suddenly finding myself 2 ft in front of a truck wasn't pleasant.