My experience driving through NJ and NY is not so much that your RV isn't allowed on the Parkway's, it's that you'll finally realize the worst fear of rippping your roof off like a tin can. There's many bridges that are not tall enough for us to fit under. I got on some by following the GPS more than once and had some "friendly honking" referred to earlier going on thank goodness. The locals warning me to get off. I guess that's one place where the computer software GPS allowing you to specifiy your height is preferred over a regular GPS.