I don't think a travel ban is enforceable, per se. What they're really saying/warning is that if you go out and get stuck, you'll be on your own for a while. You won't be considered an emergency call.
I was living in Randallstown, MD at the time & remember it well. Lots of snow & no school for week..
The KU book details the shift in the track which to it right over NJ.
Amongst other things, the NWS has me at 7 to 13 inches, then ice. This forecast covers from central Delaware to NW NJ. Makes no sense, this should be broken into several different zones. They usually do that for these situations
Regardless of which models are right, it appears we're in for a general 6 to 12 inch snowfall before any mix/change.
I cannot believe that so many are miserable about that.