Glad you are okay, that sounds terrifying. I know its hard during something like this but try and remember all the details about him and his vehicle. Also if you were driving past any businesses you might want to go back and see if any have security cameras that catch the road. Make sure you note date/time of when you were driving through. The RR crossing might have cameras too from CSX or whoever owns the rails. If you can get a color/make of the vehicle to police they might have an idea of who it is. Usually people like this don't just suddenly fly off the handle and he might have priors, especially if its a rural/small town area.