This incident has been heavily reported in the Nashville press, as you can imagine. Recently an article reported that there was video of the the traffic preceeding the accident; it shows that traffic was moving slowly but smoothly in the 2 open lanes. All 4 lanes were not at a standstill, as the RV driver claimed.
There are NO blind curves in that area. You can see traffic for at least 1/2 mile ahead at that point; I've driven it many times.
Of course if you are doing 70 mph, 1/2 mile is less than 30 seconds, which is NOT long enough to stop a RV at that speed.
The RV driver was going too fast and not paying attention to the traffic around him.
Video evidence found