I'm reviving this because I wanted to post an update on that MM 58-68 stretch of I-75 in Kentucky. It looks like I was wrong about Kentucky widening this stretch from 2 to 3 lanes, and it looks like it was indeed just a resurfacing (too much wishful thinking on my part). Anyway, even though there are construction signs still up during parts of this stretch, I haven't seen any lane closures on this stretch for a few weeks now, and I've driven it several times each way during the last few weeks. Traffic, as a result, is flowing much better on this stretch now than it was for parts of October.