Last time I checked, I-16 does not go from Atlanta to Savannah, but from Macon to Savannah. I have a friend that travels 1-16 from the Hwy441 interchange to Savannah regularly and she said it is fine, just a little "bumpy" like all the old concrete interstates. I have traveled it myself, though not recently, and do not remember any particular problems and the only real "traffic" was near Macon and near Savannah.