I've been monitoring that frequency everyday nonstop since we last talked & nothing, last night my grandson who through me is severly bitten by the scanner bug, well to get him out of everybodys hair I set him up with the task of listening to one my scanners with instructions to call me if he hears anything on that frequency, as a good soldier he fixates on the scanner, lo & behold later on, I hear some radio chatter & just as I enter my office it stops, of course all he could remember is that whoever was communcating had deep southern accents, that along with your I-575 reference got me to thinking & this may start getting us closer to solving this mystery.
Interstate 575 - Wikipedia, the free encyclopedia
Keep in touch & with luck in about a thousand years we will have this all wrapped up. Without the danger of getting caught by the RR crossposting police, maybe you can put a small sidebar blurb about this on the Georgia Forum & see what comes up.
FLRAILMAN