Whenever I read about a murder victim being found along an interstate highway, I think about a truck-driving serial killer.
It's a pretty good distance, but I saw that another unidentified victim was found off of I-10 in Mobile. The location just happens to be a few miles west of the southern terminus of I-65.
http://www.local15tv.com/news/local...nterstate/DnNUyA7zdkWR5DjUtbdofA.cspx?rss=217
(Now I'm thinking the AL body may be Kathy Inman who was last seen while she was having some kind of "mental fit" in the general area)
Whether the body is connected or not, other murders along major roads should be examined for a possible connection. This has pretty much been on all of the local media outlets, hence I'd be surprised if she were local and no one noticed her disappearance.
A truck-driving (or frequently traveling) serial killer can and have dumped their victims a vast distance from where they found them.