There is a plan, or at least some ideas being kicked around for 76.
http://bransonspiritof76.com/
I would highly suggest bleacher seating at roundabout intersections, 1 buck per hr. watching bluehairs lose it. I've seen this first hand when Fayetteville put one in by the hospital. I love them and understand them but it's completely foreign to folks over 50. Some hate them so much that they avoid them. I know the one down by the landing is nice but that's not bluehair way.
I think roundabout intersections work pretty good if you have one major roadway, with a minor roadway intersection. So basically your movements continue to flow properly. If you have a turning movement that is extremely heavy in one direction (like an on-ramp for a highway) the roundabouts can actually cause a bigger backup than the traffic light. So I think these would work okay for the minor intersections along 76 but would be nightmares at 76 and Indian Point Road, or 76 and Ozark Mountain High Road.
One other issue would be the size of the land it would take to make a roundabout work properly, so along the developed areas of 76, some businesses might have to be purchased for right-of-way purposes.
But if done properly and in the right locations, these definitely help with traffic flow and can serve as traffic calming measures too (plus if videoed they could provide some free entertainment).
Jay