Below are a few images depicting rumbles applied just to be doing something.
The first two are SR 274, Old Railroad Bed Road north or Coldwater Creek, TN. The first shows the curves and hills. The second shows rumbles applied next to a guardrail. This goes on for over a mile.
The third image shows rumbles on US 31 North of Chapel Hill, TN. All these are fairly recent. I don't think they are the latest bike friendly version but they do start at and follow the white line. The older version had the rumbles in the middle of and wandering all over the shoulder. So some progress but should these be done at all? They certainly do not fit the AASHTO guidelines.
But to keep things in perspective, Check out the last image, taken yesterday near Athens, GA. This is the standard in our neighboring states. Last photo courtesy of Bob Schofield, http://www.crazyguyonabike.com/doc/page/?o=RrzKj&page_id=125735&v=KN