"Watch out for those "excuses" of yours they could be proven to be detrimental to your health and or livelihood. 10/15 minutes chaining one side of your truck is FAR safer than hours parked."
I lived in Atlanta and know how they drive. Even 15 minutes on those shoulders would be dangerous. I also ran fire/rescue and ambulance for ten years. EVERY winter, we responded to at least one accident where a car on the shoulder was hit by another sliding car. Several of those accidents had injuries and one a death. We had one where a PA State Trooper ended up on top of the guard wire out in front of my house. That one was on an ice coated road and the trooper was responding to a wreck that was in front of the house. Fire fighters were jumping the wire and rolling down the hill to avoid getting killed.
We lived out in the country then, multiply those by tens of thousands. Shoulders in Atlanta, during an ice storm, are not safe. The "safest" thing would be to remain inside the vehicle and attempt to get off the road at the first place possible. Yes, you could get hit. You are just as likely to get hit on the shoulder while chaining up, only there, you are not in the truck. Far less chance of surviving outside of the truck than in. It is a percentage game. I will make my decisions based on my experience. Those experiences have served me quite well for many decades. I think I will stick with them.