My sister and I will be landing at CDG on 12/22, and we are hoping to drive to Strasbourg versus taking the train. We are both comfortable driving throughout Europe, but our concerns lie with the uncertainty of winter road conditions on and near the A4. Much of what I am reading online indicates that northeastern France has a mostly moderate winter season with frequent snow but ice storms and road closures are rare. Additionally, what should we expect for road conditions onward to Colmar and Basel, Switzerland? I don't anticipate driving farther south than Basel.
I realize that one cannot predict the weather, but I am trying to gather enough "evidence" to support the idea of driving in lieu of booking train tickets when they become available in September.
Any guidance and advice is appreciated.