I was driving east over the Bay Bridge (Route 50). I saw an white oval object in the distance, fairly high, over Kent Island/Stevensville somewhere to the east (right). The object was hovering, was white, and seemed to shine. As I drove across the bridge, it did not move. I pointed it out to my passenger, who was also able to observe it. However, it then suddenly vanished. I kept a look out driving over Kent Island, but there was no sign of it, or any other object that could have been mistaken for it.