In several U.S. States, there is by law a Presumption of a 50/50 Split in Child Custody Arrangements. In those States, unless there is a very compelling reason to rule otherwise, the courts are mandated to order a 50/50 arrangement.
The State of Georgia has no such presumption at present, and the judge has discretion in determining a fair outcome for all parties concerned.
In the event that presumption existed, it could create a problem in regions like the Metro Atlanta area where a divorcing couple could be geographically relatively close, say in Marietta and Norcross, but in reality traffic and gridlock can turn what should be a 15 minute drive into an hour plus. In a metropolitan region like Atlanta it would be highly likely judges would have to issue deviations from the law on a frequent basis, as a true 50/50 arrangement could be logistically untenable to both parties and the child.
Steve Shewmaker and Jimmy Lewis discuss in this video.